No matter how much I like Bitcoins , it cannot be used instead of paper money.
It's Volatile
It does need internet
We need to solve the transaction fee problem
There is still updates needed in lightning network
Bitcoins is not acceptable everywhere in the world
Many banks are not in favour of Bitcoins and thus they usually ban the accounts if they are being used
Bitcoin will need fiat for sure
We have people living without electricity and mobile phones what about them ?
What about old people and super young kids ? How will they be able to buy anything ??
I only knew some disadvantages on the list and I think that this helped me fortify my argument that bitcoin will not completely replace fiat in our time. What surprises me on the list is that banks are banning accounts that have an inkling affiliation with bitcoin, I don't think that it will be fruitful effort for the banks to do that because this will only shoo away their customers. Transaction is the a small problem that can be easily solved, if they can do a simple transfer without the fee I think it will solve the problem.