The coins that big money can buy for long-term investment in the future—I only trust BTC. After going through two bull and bear cycles, I no longer believe in all the altcoin narratives. Altcoins are only suitable for short- to mid-term speculation. Take profits and run; never hold onto them for dear life. Spot trading is fine if it's just BTC. For the other 99% of altcoins, they will eventually trend toward zero and get delisted in the long run. If you have altcoins, it's best to find an opportunity to swap them for BTC. Don't complain that BTC rises slowly or is expensive. Invest in BTC for the long term—that's the way to make money.