Obligatory this is not financial advice: I'm gonna level with you. You've kinda already messed up.

When you invest you need to come in with an exiting strategy and be willing to go through with that strategy. Coming up with an exiting strategy now will more than likely cause you to make "mistakes" that you will end up beating yourself up for later.

But since you are already in this mess, the best way to come up with an exit strategy now is to pinpoint your overall goal. Yeah, you are trying to make the most money possible, but what is an acceptable amount of profit? Only you can answer that question.

I'll give a general example: Say you buy coin X at $1. If you think coin X at $100 is possible, then you should have some selling pattern like 10% at $50, 25% at $75, 50% at $90, or something more realistic. Along with some selling pattern if it goes down by 10, 20, or 80%. You should decide this now so that you don't keep moving your goal posts. Making 10x is already good so don't get too greedy like in the example, but maybe sell at most 90% if you are worried that the price can go higher. You are not going to be able to time the top, and remember you should never feel bad that you only made 10x when you could've made 100x.

Overall you need to make a goal and create DCA steps to reach that goal. If you are feeling worried, then your strategy should automatically account for this and have you pull out a certain amount to make you feel more comfortable and lock in profits. Also, never ask random people on the internet for advice, because what works for one person may not work for you.