Many of us are wondering what would happen if crypto vanished altogether (and probably having jitters at such a thought). Well, I'm not that cruel, and only propose to discuss the less evil problem, if a problem at all.
I'm optimistic when it comes to Bitcoin and cryptocurrency in general but to be honest, I'm still thinking that there is a chance that it will happen (around 0.00001% maybe or lower). Its not cruelty to be honest but it is thinking of both sides and take note that a coin has 2 sides and it can be applied here 
. As I'm inclined to think, a few remaining coins would benefit dramatically. My train of thought is as follows. We can plausibly claim that Bitcoin would be far better off now if not for the huge pile of shitcoins that turned out outright scams at the end of the day. People wouldn't have lost their money in these schemes, and they wouldn't lose it if they invested it in Bitcoin instead. Simple and straightforward logic, right?
They are predicting that 90% or more of the altcoins in the market right now will be vanished in the future because of lack of marketing, support and liquidity in exchanges. Some altcoins right now are turning into scam especially those new projects that is why many investors don't want to invest in new projects. I'd rather like that most of the altcoins right now will be vanish because to be honest, most of them are totally useless. People are just creating coins for profit.