I think Bitcointalk forum has already owned coin, and that is Bitcoin. Because when Satoshi founded Bitcoin this forum also was made by Satoshi that talks related Bitcoin and other cryptos. (IMO)
Probably that is very interesting if ever happen but make it sure that coin is must supported with Bitcoin, not on ERC20, most likely ICO now base on ERC20.
You say my thought. The coin of Bitcointalk is Bitcoin, Satoshi created this forum for Bitcoin discussion, i was not here in the first days but i think at that days they only talked about Bitcoin here, altcoins added later. Because at first there was only one cryptocurrency, it's Bitcoin.