I believe the future of BTC is not being used as a everyday payment system and not just a minor mini-transaction system, but it going going to become a big reserve of value I think. I think it would be Similar to what gold is today.
I think the first intentions bitcoin is made for becoming the minor transaction system because in a real we 've already had a fiat become a major transaction system, but you're true will like gold because bitcoin having usefulness like gold can become your investment.
Bitcoin is the answer of the expensive transaction fee and low transaction, with bitcoin in a matter of seconds we can connect with the transacting person and that is the best benefits for a coin that is invented. Although it will not beat the fiat but its usefulness will give more benefits for the people especially its users.