Keep in mind that bitcoin is software. It can, and will be upgraded. If Ethereum ends up leading the way with proof of stake and it ends up being a success, then there is no reason to believe that bitcoin wouldn't follow in its footsteps. Crypto is a concept, as much as it is an individual coin game. Bitcoin may not end up being the leader, but your money will definitely change in the future, and it will absolutely be because of crypto currencies.