Of course it will take time but I think it will be as altcoin as bitcoin.
There will be even more than one because the functionality of the banks will be reduced and such digital money will be valued.
As we can notice, a lot of bitcoin are brought into public and massive deals of it come into this industry. Therefore, the possibility of it by which taking bitcoin out the lead, by altcoins, could be possible within such seens. It is just that, time will be really a factor dealing in it. But this can somehow be impossible if the innovation in bitcoin continues.