I think there are two huge problems concerning the Bitcoin’s future use in daily life.

1)     Slow transactions

It’s a turtle compared to most of the other coins, why should we choose Bitcoin? We actually need real time payments (as we already have them in real life)

2)   No reimbursements

Paying using Bitcoin (or other cryptocurrencies) can be really really stressful.
If I make mistakes in sending bitcoin (and people make mistakes all the time) I won’t never get reimbursed in any way…it’s not the same with FIAT.
If someone clones my credit card I have some chances to get my money back…what about bitcoin?!

At the moment, it’s impossible that Bitcoin or other cryptos are going to replace FIAT money in every day’s use.

Moreover, some more modern currencies have a better technology.
If we really will use cryptocurrencies in daily life, why should Bitcoin be the best coin to use?

This is the key question, because if we won’t use it, Bitcoin will be worth 0 and not 100.000$ as someone says.