This hash tag seems to be centered on bitcoin and etherium switching places in market capitalization which is calculated using total coins available multiplied by the current market price.  Etherium ha some questionable things about its initial release and ether is not meant to be a currency, but a fuel for the smart contract platform which is also used for ICOs..

There are other places to look for this technology.  Rootstock is meant to be a smart contract platform that will run on bitcoin and there is also etherium classic (ETC) as viable future alternatives.