I’m a Capital One customer and when the boom was beginning near the end of last year I attempted to pop a large amount in via one of my unused credit cards with Capital One. The transaction was declined over and over again. I also received lots of 3D secure errors.
Looks like the company has made a decision to not allow Cryptocurrency purchases with their credit.
Hey there! We currently decline credit card purchases of cryptocurrency. We’ll continue evaluating our policy as this market evolves. ^TM