I think there are two huge problems concerning the Bitcoins future use in daily life.
1) Slow transactions
Its 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 wont never get reimbursed in any way
its 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, its impossible that Bitcoin or other cryptos are going to replace FIAT money in every days 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 wont use it, Bitcoin will be worth 0 and not 100.000$ as someone says.
The bitcoin transaction is fast, like when you buy goods, payments will be faster. In bitcoin, when youre sending, you cant easily get mistake because you only need to copy paste your bitcoin address and youre not going to encode it one by one so that you cant get mistakes and change one letter or number. But if you really thinking about bitcoin transaction is slow, someday it can improve and develop new features that can make it more faster than it is now.