I agree that you have to know when to hold and when to sell it when there's opportunity and wait for lower entry price to buyback later. You can make higher amount of money trading rather than just holding your coin for a long time, holding is find if your investment time frame is more than 2 year.
Yes, ones need to know that right time to buy dip which I believe that's pretty simple to know or ask on here and you said spending time trading can bring higher profit than just holding which I agree but how can someone who barely know the right time to buy dip, trade successful?
I think that if you continue to buy and hold coin at this time you will continue to lose heavily, the market is bearish in the long term and I believe the bitcoin price will be able to continue fluctuations. and more aggressive and may drop to $ 5000 in the near future. So if you buy bitcoin at this moment I believe you will definitely damage very heavily. The market will continue to fall sharply in the coming time.