Off chain transactions will be the fastest way to get mass adoption. Of course that also requires trust so it will take time. I personally would love to pay for my coffee with bitcoin.
I agree with this. This is one major advantage that coinbase has over bitpay. The fact that there are a lot of coinbase customers that store their BTC on their platform and can spend their funds instantly into the accounts of other coinbase accounts is a huge advantage. As long as coinbase can be sufficiently trusted they will have the advantage of being able to guarantee some percentage of transactions instantly with the level of certainty of 6 confirmations.