it does not rule out the possibility, but we need to know, if there is a cryptocurrency that can take over bitcoin it will take 5 to 10 years. How come, since the arrival of bitcoin he has become part of our flesh and blood .. while saying new crypto as a substitute is not easy, the point is bitcoin is still bitcoin, as a single and parent. as for innovation in growing the bitcoin revolution in the future.
Simply because bitcoin has no authorized organization that controls it nor some owner who keeps saying things that don't really exist on their project. Bitcoin has been there and no one has to promote it instead everyone who has it promote it in their own different way. This is why Bitcoin is hard to beat by any other top altcoins out there. They cannot beat those promoting BTC without payment.
^ That is a simple answer, of course, it is fully decentralized, and no one controls it. Even though if the creator will back, still the price varies on the demand on supply, unless if there is a huge amount being sold. The meaning of altcoins is alternate coin so it means they are only alternate to BTC and BTC is the number one coin in cryptocurrencies. Nevertheless, BTC is far away from other coins that is why there are too many investors in BTC rather than altcoin because they now the full decentralization.