This is totally possible, as was Amazon going from $5.50 to $2,000. So if you did get in at the peak of the dotcom bubble at $75, you'd be sitting on 26x profits 18 years later

Of course it'd be nice to have that 300x from the lows of 2001, which is why it's worth sticking with crypto and wait that for that tasty final dip.
As for the amount of dotcom businesses (IPOs) that went bankrupt, I wouldn't be surprised for this to happen to 90% of the ICOs raised in the last year, but I expect many altcoins will survive. in the 2013 "bubble pop" top altcoins lost up to 99% before reaching in all time highs only 5 years later.