Secondly i have learned never to panic during any crisis time or when the bitcoin price drop significantly because in the near future it will increase in value again, and also to hold an amount i can afford to look away from for a long time.
This is very easy to say but when the time comes, it could be very different. It's not easy to control your emotions well enough when the price of Bitcoin just keeps going down. Your investment would be depreciating right in front of you and there's nothing you'll be able to do about it. It takes a lot for you to be calm amid all that chaos. In times like this, you have to remember that the price will still rise.
The price will rise doesn't mean it would be in the near future like you said. It could take longer than expected before Bitcoin goes back to the original price it was before that particular deep. So it will do you more harm to have a particular time in mind because you might be disappointed.