Do you know one of the first companies to accept Bitcoin on their Braintree platform was PayPal and it was back in 2015.
PayPal's former executive David Marcus joined Coinbase's board of directors.
John Rainey is the chief financial officer(CFO) of PayPal, recently he said that there is a very high probability that Bitcoin may became a popular payment method, though it may take some time but it will.
Currently one problem to accept by merchants is the Volatility, because if any merchant set his profit margin as 12% and after receiving the payment BTC price gets down to 17% he will be in problem.
So once the volatility gets down the mass adoption will take place.
Source - cointelegraph
I'm not sure if volatility is the only thing that will hold bitcoin back from being a preferred payment method, how about the fee's and transaction times? It's Bitshares with its leading technology that excites me the most.
Fee's and transection time is an issue for now but by the time volatility decrease these two area will be improved no doubt