<...> I want to khow where I done mistake.
Your mistake has been to believe the hype: that trading is a good way to make money, when the reality is that the percentage of retail investors who make money from it in the long run is very low, and the time and money invested to be one of the chosen few is often not worth it.
In my case I don't do day trading or short trading, I invest for the long term which is much more boring but a much safer way to make money.
Aside from that, you should not be trading in the first place because your experience and skills are not sufficient enough. You might be quite knowledgeable but that's never enough to make successful in your trades. Know that trading is hard and risky, so it takes a professional trader before you are entitled to gain decent amount of profits. For now, focus on long term hodling for bitcoin. If you want to maximize your future profits, then do the DCA every time you receive spare money from you salary.