I think as long as we are still using it, during that time bitcoin will live, and from time to time bitcoin will be more and more interested, so this will not end. and I consider that in the future bitcoin will be as important as fiat money.
bitcoin wont end and its said that the value can skyrocket once all of the supply have been mined up . the high value makes bitcoin more attractive . many people are expected to be interested with it but the importance of fiat money is still there . no currency on earth can end the existing of fiat money .
How bad will the fees be once all coins are mined?
Will it be too expensive to send a transaction?
they say the fees will be high but that is normal as long as the value of bitcoin will also become higher . there are segwit wallet that we can use to avoid expensive fees . thats solves the problem .