The main Altcoin does not follow BTC 100% of the time. Instead, they tend to overestimate dips but not nails. That is, people tend to withdraw from alts and enter the BTC when the BTC rises, but all coins tend to go down simultaneously. If you do math about it, it's not good. This causes altcoin not to return high when Bitcoin exceeds its highest level. The result is that when Bitcoin rises, it follows slowly (after going down and then lags behind); And when Bitcoin goes down, it seems to follow perfectly or even overstate the decline. and to exceed the current price is very unlikely, so the existing circulation in the market is still held by Bitcoin