Inherent to Stripe processing BTC is the fact that you are now a foreign exchange broker. Here's a small sample of why you're going to have to do a lot better than "we only charge 0.5%" to convince me that adding FX risk into my payment processing stack is a good idea:
http://www.bloombergview.com/articles/2014-11-12/banks-manip...
http://www.bloombergview.com/articles/2015-02-09/banks-will-...
And that's just from the last three months, in an arena that is already heavily regulated by the SEC.