I almost did the same mistake, when I entered the crypto market and next week BTC dropped 30-40%. I stop checking charts and forgot about that. I do the same thing every time when the market is going down.
To enter the crypto market you have to be calm, as well as careful with the information you receive from others, or on social networks. No one knows ahead of time how the market will be. Good control of your emotions, then you can make a profit from the market. My strategy is not to sell my Bitcoin when prices drop. That's when I buy more, because I believe Bitcoin will have a nice future.