Polkadot capitalization is: $ 9,139,235,693
Ethereum capitalization is: $ 123,675,117,146
If the developers of the Graphene cryptocurrency release their development and it bites off at least 10% of the capitalization of these cryptocurrencies, then with the amount of 230,000,000 Graphene coins, the cost of one coin will be at least $ 3.97.
Phore Blockchain Cryptocurrency May Cost $ 39.7
That quitly high price so that is your prediction right, are u using only Proof Of Stake or it will be SuperNode like some coin