Bitcoin has become gold-like and stock-like, and the future is a slow bull market; even if there is a pullback, institutions and retail investors will continue to buy and increase their holdings. After these two rounds of bull and bear market changes, everyone knows that altcoins are just like junk stocks, making money and cutting leeks, so many will be delisted and disappear. In the future, despite thousands of cryptocurrencies, the only ones worth investing in, aside from the extremely certain Bitcoin, are the relatively certain ones like ETH, BNB, XRP, SOL, and no more than a hundred altcoins. Altcoins will not all disappear, but there will always be some that do.