Previously, altcoins had BTC and ETH trading pairs on exchanges, and many people traded on a "bucks-based" basis. So every time the big and small coins rose, altcoins would only rise faster than them. After the last bull market, altcoins were delisted from trading pairs with BTC and ETH, and all were replaced with stablecoin trading pairs. This is also a very important reason why this bull market is different from the past.