Low points and losing are key components of any game worth playing. Can't have the highs, without the lows.
Researching and identifying what the errors or mistakes were makes me feel better. They show whether the scenario was winnable and pave the way to how to avoid the same mistakes in the future.
And this is where holding strong coins comes in. Holding top alts is better than low market cap coins.
Researching, studying will only be fruitful if you will continue to keep up with the progress of the coins you are invested with.
Because we have no idea about their future, but we can get some insights to where they are going if we are keeping tab with their development progress.
If you see that the dev team is slowly losing their grip, better discard and sell the coin before you regret it.