My idea is that one should not be able to make a fortune without providing value.  Gambling on seigniorage doesn't look to me like providing value.  "being first adopter" has no meaning.  Creating a useful system, yes.  Becoming rich because one was betting on it, without financing it as such, no.  That's not like a share holder of a company that financed the difficult start of the company.  The fact that first adopters gamble on it, doesn't bring in any specific value to the system or to the creator.  Their seigniorage is economically unmerited because no value was produced.

The only value one should obtain from a crypto, is the value of being able to do commerce where this was previously impossible/difficult/dangerous etc... In other words, by the economic gain of exchange, made possible by the existence of a crypto.  Not by being early adopter and sitting on your stash, limiting market liquidity for commerce.