In my opinion, bitcoin will not be the daily currency. Many countries have not approved or passed bitcoin as currency. Bitcoin takes hours to confirm, maybe another alternative solution is crypto like ETH.
Coins with such high volatility can never be used for daily transaction. It will be very difficult, because the world is going to run over the fiats, so its tough to maintain the exchange rate with so volatility.
I think country specific coins will be implemente in long future, so then its still possible.
Also Bitcoin with high confirmation time, its tough to implement it everywhere. But there are new coins and even ICO whoch is targeting daily use.