Not all Altcoins cannot survive in the market for years in cryptocurrency.
Bitcoin has extraordinary quality and greatness in cryptocurrency so that it can still be the king of cryptocurrency, but there are also Altcoins that have advantages even though they are not the same as Bitcoin. For example, Ethereum is still surviving.
Potentially ethereum despite its limitations has definitely a higher value than bitcoin even if the price and its capitalization make it the second.
Other projects solve ETH problems at the moment and Bitcoin is the original message.