In a grocery store I pay with dollars coz noone accepts bitcoins. In 20 years the situation will be the same. Because some guys made a bridge between dollars and bitcoins. Because they hid a wallet with coins in a bank vault and gave ppl paper money. Because they made Bitcoin an instrument to store wealth.
I don't mind at all if a merchant do not accept bitcoins. It is, in the pure sense of the expression,
his business. It's just the same with gold. I own most of my wealth in gold, yet I don't care if I can't buy anything directly in gold. Most of the things I buy, I buy them with euros I freshly converted from a gold sell. I only convert what I need when I need it, so I don't have to hold the silly money the merchant wants during too a long time.
Hell it's even great that merchants want me to pay them with crappy currencies. Because they are so cheap!
With a bicoin-friendly bank, I could convert my real money (gold and bitcoins) into shitty money (USD, EUR) in an even faster, more efficient way. What's not to like?