If Bitcoin stops gaining value as time goes on, I don't know what would happen to the crypto as it is.
I doubt bitcoin will stop gaining value. It’s made to withstand inflation so we know it’s not going to go backwards. But will it continue to rise upwards? My answer is yes because bitcoin isn’t just some random token. It has a purpose. A utility.
If it stops being valuable though, which if it ever happens will come a long time, I don’t think crypto will cease to exist. By that time, I am sure if bitcoin stops being valuable it’s because something else has risen.