Bitcoin just doesn't deliver what he promises, cheap and fast money transactions. Transactions via BTC network are not cheap at all ($55 per transaction and raising), they are the most expensive transactions around, plus you can't even make a transaction because network is clogged, 282 000 unconfirmed transactions, we only have a promise of Lightning Network as a solution for this problem, solution that is not fully implemented, solution that is not Bitcoin, promise is not a solution, promise in software industry is called vaporware. In my honest opinion, after 5+ years of using BTC, currently it's worth $0 (ZERO).
I think there are way too many heavily invested stakeholders to let this coin truely drop to 0$. If such a crash were to begin to happen I believe the miners and other stakeholders would get their act together and develop updates to resolve the weaknesses of the coin. For example, do you really think coinbase would profit from the complete collapse of the crypto market? I think they would rather invest in infrastructure to make it last for the long haul.