I keep talking about that, and I'll add that we can look at bitcoin now:
up to 2 months ago the price of bitcoin was over $65000
today the price of bitcoin is $45000
so that means all the people who bought when the bitcoin price was $64000 then having losses of $20,000 and the bitcoin price can take months to get back to $65000, so even if the person who bought bitcoin at $65000 is doing hodl for 1 year for example this person will not make as much profit as he wanted
Buying when coin is at ATH or near to that is biggest mistake one can do. I remember I used to do such mistake when I was new to crypto. At such price WHALES (wise investors) are selling while fools are buying. If you are experienced trader then buying at ATH is suitable for day trading only. Me as a hodler wont buy at such price.