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Or the coins that have no real value in society (which i think there are many of) will simply fail and decay. Only the ones with real use, like steem or litecoin, will stay alive.

It is the nature of technology to continuously improve. ICO will be the answer to its own problem I think. Eventually a newer better, full feature Crypto will emerge in my opinion.

Of course, as blockchain develops newer cryptos with full functionality will emerge, just a matter of time :)