You can't stop things like Bitcoin. It will be everywhere, and the world will have to readjust. World governments will have to readjust

John McAfee , Founder of McAfee

It's money 2.0, a huge, huge, huge deal.

Chamath Palihapitiya , Previous head of AOL instant messenger

We have elected to put our money and faith in a mathematical framework that is free of politics and human error.

Tyler Winklevoss , Founder of Gemeni.com

There are 3 eras of currency: Commodity based, politically based, and now, math based.

Chris Dixon , Co-founder of Hunch and SiteAdvisor

Bitcoin may be the TCP/IP of money.

Paul Buchheit , Creator of Gmail

I think the fact that within the bitcoin universe an algorithm replaces the functions of [the government] … is actually pretty cool. I am a big fan of Bitcoin

Al Gore , 45th Vice President of the United States

I do think Bitcoin is the first [encrypted money] that has the potential to do something like change the world.

Peter Thiel , Co-Founder of Paypal

I really like Bitcoin. I own Bitcoins. It's a store of value, a distributed ledger. It's a great place to put assets, especially in places like Argentina with 40 per cent inflation, where $1 today is worth 60 cents in a year, and a government's currency does not hold value. It's also a good investment vehicle if you have an appetite for risk. But it won't be a currency until volatility slows down.

David Marcus , CEO of Paypal

"[Virtual Currencies] may hold long-term promise, particularly if the innovations promote a faster, more secure and more efficient payment system.

Ben Bernanke , Previous Chairman of US Federal Reserve

Virgin Galactic is a bold entrepreneurial technology. It's driving a revolution and Bitcoin is doing just the same when it comes to inventing a new currency

Sir Richard Branson , Founder of Virgin Records, Virgin Galactic, and 400+ other businesses

Bitcoin actually has the balance and incentives right, and that is why it is starting to take off

Julian Assange , Founder of Wikileaks

[Bitcoin] is a very exciting development, it might lead to a world currency. I think over the next decade it will grow to become one of the most important ways to pay for things and transfer assets

Kim Dotcom , CEO of MegaUpload

Bitcoin is a remarkable cryptographic achievement and the ability to create something that is not duplicable in the digital world has enormous value

Eric Schmidt , CEO of Google