I mean you cant just make something up and then assume its value is equal to the value of all assets and commodities in existence. As far as I can see the endgame is for miners to just get 'credit-card fees' for transaction processing but there is no guarantee of an infinite market cap based on finite supply especially with holders determining value by sales without losing their value as majority holders and especially, with that value not backed as a security. There's a chance a push happens towards adoption but that will just tank the value. In that BTC still has function as a hedge and a transport of value but the growth is not infinite.