And yet every corporation has its own stock. Tens (hundreds?) of thousands of different stocks out there, spread across of host of heterogeneous markets, and yet capitalism continues to thrive.

Where I completely agree with you is on the focus on Ethereum based ERC-20 tokens. I've been mentally writing a post that won't be fully relevant for another year or two, but it's about locating all of one's eggs in a single basket.

One of the things I like about ICONOMI (not shilling, promise!) was that they were asked during their ICO phase what they would do if Ethereum crashed. This was right in the middle of the computational DOS attacks, so it was a very relevant question. Their answer was they were already looking at other blockchains as backups (specifically Lisk, which, really?). Frankly, every ICO needs to have an answer to that question: what's your plan if Ethereum curls up and dies?