I think that 95% of crypto coins and tokens won't survive and the reason is that a crypto coin in order to survive and get value it has to be accepted as a way of payment for purchase goods or services.
Very few coins will manage to do it at the end of the day and of course these coins will get enormous value.
The only thing you have to do is to find out which coins will enter the market of real currencies.
I don't think so. Some crypto will soon cease to exist since some of them will loose investors as their value go down. That is why you should be smart upon picking on which crypto you are going to keep on investing in. Bitcoin is most likely to survive since it is very powerful and it is the pioneer of cryptocurrency.