I believe that many altcoins will die off due to week fundamentals, all the weak projects, meme coins and speculative tokens will vanish over time. Bitcoin is more entrenched than any other crypto that's why I believe that it's strength will make sure any crypto that actually survives, must justify its existence
Bitcoin never kills any coin. However, the price of other coins goes up and down based on the movement of Bitcoin because when the price of Bitcoin increases, everyone thinks the market is good and investors are encouraged to invest, but when the price of Bitcoin decreases, the market thinks it is bad and investors want to stay away from investment. However, not all coins move depending on the market. Some coins are brought to the market to cheat users. So, before investing, you must do a lot of analysis.