We now understand this, but only 10 days ago no one knew exactly where the bottom would be and where it would be possible to buy cheap coins for speculation in order to sell them at 36k. People know how to analyze the possible profit after the fact, but in real time it turns out much worse.
It's too easy to look at what happened and say something but it is challenging to say about future. So you are right. If we can say about the future correctly as what we look at the chart, and say about the past, we all get rich. In a market, it is unrealistic that everyone get rich because capital has to change hands, from losers to winners.
In any case, buying coins for speculation on a possible bottom is a big risk and you can get stuck with such an investment for at least a few months. Moreover, we see that bitcoin does not hold any level at all, it quickly rises to 35-36k and the next day again tends to 30-32k. Looking at these movements, every day I am getting more and more prepared for the fact that we will not hold the key support level of 30k.
$24,000 or lower to above $20,000 can be a good support for Bitcoin. I think it will be a real bottom for this detrimental time for holders. I can not imagine any price lower than $20,000 at least now.