They are simply having to duplicate all the things Visa provides its customers.
BTC is inherently deflationary in the sense that once new coins cease to be mined the total number of BTC will decrease over time due to lose, theft and death. I know that I lost my wallet with the only BTC I owned 10 years ago. I can name several other people that have done the same. I would think this one property makes it undesirable for use as a currency.