Actually a lot of people have been doing well before the adoption of cryptocurrency, there are a lot of people who decided not to go into this crypto space yet they're still in a better position. So for me I don't think if the disappearance of cryptocurrencies can affect me in anyway rather I will just feel depressed for sometime, reason is because is also one of the source in which one can make money online without stress but I hope this is just an exaggeration because most people are surviving due to the help of this cryptocurrency.
cases like this when it comes to any form of investment it is not everyone will make money from it, some people hear that from day one they have not made any money from investing or even trading bitcoin and it won't be because of the market but because of lack of understanding that they have, and that is why they will always advise you to make a proper inquiry about bitcoin before you start investing, not just jumping and people that are yet to start investing are better just as you said and those that are investing and they are not making money just because that lack qualities of things that they need to invest in bitcoin, the only effect that cryptocurrency disappearance will cause will be when they run away with peoples money than there will be an issue and that will like be from the exchanges. I know authorities won't take such matters seriously and am sure that nothing will ever happen to cryptocurrency it is not going anywhere since governments are already making it an alternative currency.