Cryptocurrencies allowed non-custodial exchange, without users having to sign up or create accounts.

ShapeShift has no user accounts, signup, or registration process whatsoever. But it's faster and far more convenient than traditional exchanges.

You cannot have an asset that goes up in price 1% every month or 1% every six months or every day without people starting to start thinking it'll do the same tomorrow, so that's why these bubbles form.

Credits in your PayPal account are really just USD-backed - they are not a unique currency themselves. Other 'digital currencies,' such as Facebook Credits, can be created out of nothing and without limit, so they are not serious money.

I'm much more confident with crypto than with banks or fiat currency because I can actually control it, and the money supply is transparent, stated up front. It makes online shopping a lot easier and a lot safer.

Whenever the price of cryptocurrency is rallying, people start spending a lot more.