Interesting point but I think you're overlooking the fact that some of the crytpos have different functions/purposes. For instance, I got excited about ethereum for a different reason than I did about bitcoin....and I got excited about Steem for a different reason than I did ethereum.
Granted, I am certainly no expert when it comes to this stuff, but I suspect if you looked more closely at these crytpos, you'd see some subtle differences and variations.
I'm not an expert either. I think we are all trying to learn our way.