The lucrative area has sparked a trend in "cryptojacking", a phenomenon where companies install a programme to hijack the computing power of visitors to a webpage to mine cryptocurrency. The person who has been "cryptojacked" will only notice a small, temporary drop in computer speed.
In February, hackers took over thousands of government websites to install cryptojacking software. The sites, including the Information Commissioner's Office, the Scottish NHS helpline and the Student Loans company - along with hundreds of other central and local government sites - were unknowingly running the power-pinching program.
Argo was developed by Jonathan Bixby and Mike Edwards, who own around 13 per cent of the company. Miton Capital, Henderson Global Investors and Jupiter Asset Management, are named on the shareholder register.
Argo plans to use the cash to drive its expansion and raise its public profile. Upon announcing its plans to go public, Bixby said: "We have launched this service to take the pain and heartache out of participating in the biggest new technology breakthrough since the launch of the internet."
Those interested can sign up for £18 a month and have a choice of four digital currencies: Bitcoin Gold, Ethereum Classic and ZCash, which have a total value of more than US$51 billion ($75.6b) as of August 3.