Then obviously you will loss because that's a wrong mindset to begin with. You should understand that the market is very volatile and try not to be emotional. Tryto understand yourself, and not to panic and wait till the market subsides or settle down.
Then what is the way so that I can make a big profit ...?
How to effectively avoid unnecessary losses ...?
What's your investment goal? Short or Long term?
Did you invest what you can afford to lose?
As @adaseb have said, if you're not comfortable because of the worsening market conditions, I suggest you better not to enter and try to learn more about crypto investments.