You hold on the coins that will have an actual use. U get in and out of coins that are doing well but don't really a foreseeable use. The small ones have the biggest risk but also the best returns. Good luck! It's all a gamble. So just row row row your boat...
I was just talking about people panicking because of the price drop. I pointed out that a month ago, BTC was under $10K, it reached $19K, retracted/corrected/crashed to $14K, and people are thinking its the end of days. Lol. We've gained $4K+ in a MONTH! It's amazing how people are reacting. I'm a hodler. And I think (well hope) that it will pay off. I have a strong inclination that it will, as despite this current situation, institutional money is still coming in.... ETFs planned for the future.