Mainly, each wave of market trends sees Bitcoin consolidate for over half a year before breaking new highs. Each time before a crash, the premise is that Ethereum and altcoins have fully rebounded before a deep correction occurs. Right now, Ethereum has rebounded significantly, while most worthless altcoins have not moved at all. Therefore, it's a bit surprising for Bitcoin to crash directly. Let's see if the altcoins all rebound before the crash; I don't think it would be strange, as every market wave operates this way.