In this market, there are many people who are fear of missing out (FOMO). You always be patient. If you believe you have missed an opportunity, do not try to join if you are unsure. You can lose more than earn. Crypto is a 24/7/365 market. You can not catch every trade. If you miss one, do not worry - there's ALWAYS another trade.
When it comes to HODL, its always best to have patience cause thats simply the best thing to do. If price drops when you least expected it and you happen to have lost a huge percentage of your money, then its best to leave it your coins there and just forget it and wait for another time when the price will get high again. Although that might take years, but you already showed you were ready for that when you invested your money.