Business Organization and Nature of Operations	6 Months Ended	12 Months Ended
Jun. 30, 2018	Dec. 31, 2017
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Business Organization and Nature of Operations	Note 1 - Business Organization and Nature of Operations BTCS Inc. (formerly Bitcoin Shop, Inc.), a Nevada corporation (the “Company”) was incorporated in 2008. In February 2014, the Company entered the business of hosting an online ecommerce marketplace where consumers can purchase merchandise using digital currencies, including bitcoin and is currently focused on blockchain and digital currency ecosystems. In January 2015, the Company began a rebranding campaign using its BTCS.COM domain (shorthand for Blockchain Technology Consumer Solutions) to better reflect its broadened strategy. The Company released its new website which included broader information on its strategy. In late 2014 we shifted our focus towards our transaction verification service business, also known as bitcoin mining, though in mid-2016 we ceased our transaction verification services operation at our North Carolina facility due to capital constraints. Subject to additional financing, the Company plans to acquire additional Digital Assets to provide investors with indirect ownership of Digital Assets that are not securities, such as bitcoin and ether. The Company intends to acquire Digital Assets through open market purchases. Additionally, the Company may acquire Digital Assets by resuming its transaction verification services business through outsourced data centers and earning rewards in Digital Assets by securing their respective blockchains. We are not limiting our assets to a single type of Digital Asset and may purchase a variety of Digital Assets that appear to benefit our investors and/or blockchain, subject to the limitations regarding Digital Securities. The Company is also seeking to acquire controlling interests in businesses in the blockchain industry. We do not intend to operate outside of the Digital Asset and blockchain industries. The Company has not participated in any initial coin offerings as it believes most of the offerings entail the offering of Digital Securities and require registration under the Securities Act and under state securities laws, or can only be sold to accredited investors in the United States. Since about July 2017, initial coin offerings using Digital Securities have been (or should be) limited to accredited investors. Because we cannot qualify as an accredited investor, we do not intend to acquire coins in initial coin offerings or from purchasers in such offerings. Further, the Company does not intend to participate in registered or unregistered initial coin offerings. The Company will carefully review its purchases of Digital Securities to avoid violating the 1940 Act and seek to reduce potential liabilities under the federal securities laws. Digital asset blockchains are typically maintained by a network of participants which run servers which secure their blockchain. The market is rapidly evolving and there can be no assurances that we will be competitive with industry participants that have or may have greater resources than us.	Note 1 - Organization and Description of Business and Recent Developments BTCS Inc. (formerly Bitcoin Shop, Inc.), a Nevada corporation (the “Company”) was incorporated in 2008. In February 2014, the Company entered the business of hosting an online ecommerce marketplace where consumers can purchase merchandise using digital currencies, including bitcoin and is currently focused on blockchain and digital currency ecosystems. In January 2015, the Company began a rebranding campaign using its BTCS.COM domain (shorthand for Blockchain Technology Consumer Solutions) to better reflect its broadened strategy. The Company released its new website which included broader information on its strategy. In late 2014 we shifted our focus towards our transaction verification service business, also known as bitcoin mining, though in mid-2016 we ceased our transaction verification services operation at our North Carolina facility due to capital constraints. The Company is an early entrant in the Digital Asset market and one of the first U.S. publicly traded companies to be involved with Digital Assets and blockchain technologies. Subject to additional financing, the Company plans to create a portfolio of digital assets including bitcoin and other “protocol tokens” to provide investors a diversified pure-play exposure to the bitcoin and blockchain industries. The Company intends to acquire digital assets through open market purchases. Additionally, the Company may acquire digital assets by resuming its transaction verification services business through outsourced data centers and earning rewards in digital assets by securing their respective blockchains. Reverse Stock Split and Amendment to Certificate of Incorporation On February 13, 2017, the Company filed a Certificate of Amendment to its Articles of Incorporation with the Secretary of State of Nevada to implement a reverse stock split at a ratio of one-for-60. The reverse stock split became effective immediately. On February 15, 2017, the Company’s Common Stock began trading on the OTCQB under the symbol “BTCSD.” On approximately March 15, 2017, the Common Stock resumed trading under the symbol “BTCS.” The Reverse Stock Split reduced the number of outstanding shares of Common Stock from 952,756,004 shares to 15,879,262 shares as of December 31, 2016. All per share amounts and outstanding shares of Common Stock including stock options, restricted stock and warrants, have been retroactively adjusted in these consolidated financial statements for all periods presented to reflect the 1-for-60 Reverse Stock Split. Further, exercise prices of stock options and warrants have been retroactively adjusted in these consolidated financial statements for all periods presented to reflect the 1-for-60 Reverse Stock Split. Numbers of shares of the Company’s preferred stock and convertible securities were not affected by the Reverse Stock Split; however, the conversion ratios have been adjusted to reflect the Reverse Stock Split.

Business Organization and Nature of Operations

6 Months Ended

12 Months Ended

Jun. 30, 2018

Dec. 31, 2017

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Business Organization and Nature of Operations

Note 1 - Business Organization and Nature of Operations

BTCS Inc. (formerly Bitcoin Shop, Inc.), a Nevada corporation (the “Company”) was incorporated in 2008. In February 2014, the Company entered the business of hosting an online ecommerce marketplace where consumers can purchase merchandise using digital currencies, including bitcoin and is currently focused on blockchain and digital currency ecosystems. In January 2015, the Company began a rebranding campaign using its BTCS.COM domain (shorthand for Blockchain Technology Consumer Solutions) to better reflect its broadened strategy. The Company released its new website which included broader information on its strategy. In late 2014 we shifted our focus towards our transaction verification service business, also known as bitcoin mining, though in mid-2016 we ceased our transaction verification services operation at our North Carolina facility due to capital constraints.

Subject to additional financing, the Company plans to acquire additional Digital Assets to provide investors with indirect ownership of Digital Assets that are not securities, such as bitcoin and ether. The Company intends to acquire Digital Assets through open market purchases. Additionally, the Company may acquire Digital Assets by resuming its transaction verification services business through outsourced data centers and earning rewards in Digital Assets by securing their respective blockchains. We are not limiting our assets to a single type of Digital Asset and may purchase a variety of Digital Assets that appear to benefit our investors and/or blockchain, subject to the limitations regarding Digital Securities. The Company is also seeking to acquire controlling interests in businesses in the blockchain industry. We do not intend to operate outside of the Digital Asset and blockchain industries.

The Company has not participated in any initial coin offerings as it believes most of the offerings entail the offering of Digital Securities and require registration under the Securities Act and under state securities laws, or can only be sold to accredited investors in the United States. Since about July 2017, initial coin offerings using Digital Securities have been (or should be) limited to accredited investors. Because we cannot qualify as an accredited investor, we do not intend to acquire coins in initial coin offerings or from purchasers in such offerings. Further, the Company does not intend to participate in registered or unregistered initial coin offerings. The Company will carefully review its purchases of Digital Securities to avoid violating the 1940 Act and seek to reduce potential liabilities under the federal securities laws.

Digital asset blockchains are typically maintained by a network of participants which run servers which secure their blockchain. The market is rapidly evolving and there can be no assurances that we will be competitive with industry participants that have or may have greater resources than us.

Note 1 - Organization and Description of Business and Recent Developments

The Company is an early entrant in the Digital Asset market and one of the first U.S. publicly traded companies to be involved with Digital Assets and blockchain technologies. Subject to additional financing, the Company plans to create a portfolio of digital assets including bitcoin and other “protocol tokens” to provide investors a diversified pure-play exposure to the bitcoin and blockchain industries. The Company intends to acquire digital assets through open market purchases. Additionally, the Company may acquire digital assets by resuming its transaction verification services business through outsourced data centers and earning rewards in digital assets by securing their respective blockchains.

Reverse Stock Split and Amendment to Certificate of Incorporation

On February 13, 2017, the Company filed a Certificate of Amendment to its Articles of Incorporation with the Secretary of State of Nevada to implement a reverse stock split at a ratio of one-for-60. The reverse stock split became effective immediately.

On February 15, 2017, the Company’s Common Stock began trading on the OTCQB under the symbol “BTCSD.” On approximately March 15, 2017, the Common Stock resumed trading under the symbol “BTCS.”

The Reverse Stock Split reduced the number of outstanding shares of Common Stock from 952,756,004 shares to 15,879,262 shares as of December 31, 2016. All per share amounts and outstanding shares of Common Stock including stock options, restricted stock and warrants, have been retroactively adjusted in these consolidated financial statements for all periods presented to reflect the 1-for-60 Reverse Stock Split. Further, exercise prices of stock options and warrants have been retroactively adjusted in these consolidated financial statements for all periods presented to reflect the 1-for-60 Reverse Stock Split. Numbers of shares of the Company’s preferred stock and convertible securities were not affected by the Reverse Stock Split; however, the conversion ratios have been adjusted to reflect the Reverse Stock Split.