Bitcoin will eventually achieve its ultimate goal of becoming the world's first recognized cryptosystem and becoming the national currency of the world. No other currency will compete with bitcoin right now. As you said, many times BTC has died in the past, so we are not sure that it can be repeated in the future.
That's right, nobody can oppose Bitcoin because all other Altcoin types still stick with the Bitcoin sale price because if the price of Bitcoin decreases then all Altcoin will experience it.