That's exactly how most people react, who are greedy and don't understand the market.
Once Bitcoin is in high, many think it would only go up.
As soon as Bitcoin is in the deep, many think you could buy cheaper later.
But mostly the opposite happens.
You can see how easy you can become fish food for whales.
You actually buy their expensive coins and later sell them cheap.
Over time, you will lose more and more money until you end up with nothing left.
That's when a bull market really starts.
A tip: If you want to change something, think differently than others.