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I agree, but I also disagree. So many of these coins all have the same underlying blockchain. At some point, there will come a time when all we need is a handful of decentralized blockchains to run a plethora of side-chains that all perform some sort of varying utility.

I believe that in about 10 years, we'll see 5-to-10 blockchain "winners", with 100-200 side-chain applications that perform some sort of utility (digital content rights/ownership, mobile data sharing, video sharing, etc). I'm conservatively saying 100-200 side-chains, but in reality, I feel like the side chains will emulate / replace corporations and there could easily be thousands.

I don't know about sidechains etc but yeah, that would be something like it. Do you think the SMTs would position themselves in these slots?

Rather than regurgitating the comments on this blog, I figured I would simply share it: https://ethereum.stackexchange.com/questions/379/what-is-a-sidechain

I don't honestly know enough about SMTs, but it's possible that they could position themselves into the "side chain" slots I mentioned. It likely depends on how they're built. It seems like you could use side-chain and SMT interchangeably, but at the same time it could be designed in a completely different manner.