Before a real big market trend begins, there will always be a washout. The purpose of the big players washing the market back and forth is to shake out the retail investors' chips.
For example, when Ethereum rises to 3700, if you don't take profit, a sharp drop will make you regret it.
When the market comes back again and rises to 3700, will you consider selling?
If you can hold out, then another sharp drop occurs, bringing it down to 3300. Will you regret it? If at this time the market rises again to 3700, will you sell?
I believe that most retail investors would choose to take profit.
If retail investors can still hold on, then there will be another washout, and basically, the retail investors' chips will be cleaned out.
The main players will use big data analysis to start the market after retail investors have exited.
This is why retail investors who frequently trade will definitely lose money; human nature has already been thoroughly studied by the main players.