As of now, more than 10,000 different altcoins exist. And none of them have managed to give tough challenge to Bitcoin, which happens to be the original cryptocurrency. And the OP is talking about a scenario in which some new coin is going to do what all these thousands of alts failed to do. Theoretically, it may be possible. But I don't think that it will happen anytime soon.
In that amount of altcoins that are created in the field of cryptocurrency, there are few cryptocurrencies that are good enough to give tough and tight challenge to bitcoin and the reason why they are not competing or receiving a lot of attention is because, people are not that open minded to look for other opportunities because they are brainwashed that bitcoin is only the best coin make investment.
i don't want to use the term brainwashed. but maybe, not open minded. the popularity of bitcoin usage can't really be overcome by most projects that are offering more benefits than bitcoin. truly, there are several projects that were created to be much superior than bitcoin, however, they can't compete with bitcoin because as you said, they are not open minded people. we want to stick with btc as much as we are stuck in using USD as the global currency. if you know someone who is not into crypto, if you ask if he has any idea with crypto, and the first thing that will come up to his mind, is bitcoin. all the other alts are just secondary or most of them don't know their existence.