If we are, maybe it's just so that something new can come about (a change of the guard if you will). Even tho the complete mining of BTC is predicted to be far into the future, that dosen't mean that BTC will survive or be relevant by that time, or even in the near future.
This is going to be a surprise to me if someone like you could join to believe that bitcoin may soon go on an extinct, an end to bitcoin...? Not now and not possible because this is an additional improvised technology that bitcoin has come to save the economy, it's a currency and has better implication than that in fiat, by now i think tou should have understand the real difference between bitcoin and other cryptocurrencies.