Bitcoin has the largest market cap and is the most adopted crypto. There are many other weak cryptos that might end but not Bitcoin.
It is not only about the market cap, but about the brand bitcoin. If people talk in TV about crypto they will for sure mention bitcoin but only in some cases mention another currency. For a lot of people crypto = bitcoin and this will stay like this probably forever. The only time people speak about other coins is when there is a shitcoin having a huge pump, but that is mostly forgotten after a few weeks.
Bitcoin is exemptional, can't be compared with these shitcoins. It has been widely talked and it grow fast because of its market potential. The market cap and the influence of these whales making Bitcoin become known globally were rich people, huge investors, and as well as poor people got involved. And to think about the end of Bitcoin is too far away unlike these worthless altcoins.
It may lose its value but that doesn't mean it was a sign of its end.