Yea, everything is booming right now and probably will continue to do so for awhile... But ever heard of pets.com or books-a-million or inktomi or infospace etc etc etc? No? Right because they all had massive market capitalizations about 16-18 years ago and went down with the dotcom bubble.
I believe cryptocurrencies and the blockchains behind them will change the world, but being realistic many of the current hot coins and tokens will likely be little more than the kindling that gets the bonfire going.
Don't get me wrong I'll try my hand at making money off of as many of them as I can, I just don't think most of them will be around 5-10 years from now just because they're booming right now.