September is like Black Friday for bitcoin and some other cryptos. Massive discount on the price. It's too bad people don't see it that way; all the advertising in the world for "30% off Bitcoin price" is still going to leave people unconvinced
What you say is about the second people type who are ready to buy dips. They prepare money to buy dips, accumulate more Bitcoin. The first type are people who long Bitcoin with leverage, or have loan to buy Bitcoin. If it falls, they would be panic selling. They are losers.
Another loser type is people who believe Bitcoin will fall in September and open short positions. If short squeeze happens, they lose money.