[billions]

Imagine building a startup that moves 10's of millions of new users' monies each month out of US bank accounts. While other startups are just scaling page views, Coinbase is scaling money. Keep in mind that it takes just one financial loss to break trust from the entire community. Has any other bank in history scaled this fast?

[prepend]

Yes. Remember that online banks were once new. 10s of millions flowed through lots of banks and new services like PayPal during the dot com boom of 99/00.

[Fnoord]

At least nowadays, PayPal is a bank. Or well, has bank status in Luxembourg.