Wow.... Maybe if what you say happen.. Bitcoin will be die because cannot be mine again. And it will be bad dream for investor.
For better alternative we can invest to altcoin are support blockchain 2.0 dst.
I personally would like to believe the BTC community can resolve these potential problems internally... not saying that other alt coins dont have purpose or place but I honestly believe most of them are frauds and distractions from the ultimate goal that is a crypto CURRENCY.
It's a possibility, this is one of the things that will contribute to bitcoin's downfall, but we have a lot of emerging coins in the market, but I don't know how can this things be resolve except for a fork or another bitcoin fork to replace bitcoin.