I have no clue about that how much it will worth but if you know in the crypto there's a rule if the sky was the limit. 

I remember if, at early september, the total market capitalization of polkadot was around 6 billion. I just take it as the next floor to be broken by the polkadot. I don't wanna put a very big expectation while it's not yet surpassed the ATH of MCAP that has ever achieved by polkadot.