One thing that probably has not been thought of, during the creation of BTC, is that the number of Bitcoins will be slowly reducing to zero. There will be, in some time, 21KK BTC, but what about bitcoin that get lost? I mean hardware malfunctions. Wrong address transfers. Lost passwords. Forgotten wallets etc.
Do we know, how many of all Bitcoins is in circulations at this moment? I mean we can count the number that indicates how many it should be. We however do not know how many of them is inaccessible.
One day it might be a problem, but probably not the problem of our generation. Still statistically that says bitcoin cannot survive.
Dude just calm down and enjoy the pleasures of BTC at the moment. For BTC to die there is a log way to go. It would probably be aftaer all other cyrptos die out and it will not happen for our genereation like you said. So take my advice and reap the profits of BTC at the moment. Just think positively of the future.