As long as you already profit dont feel regret exactly.
We are just humans, dont know about the future. If a lot of people know about it, a lot of people already be a millionaire right now.
Just my suggestion, if you want to hodl your coin, you must research it first.
cause up and down is natural in this crypto world. So when you hodl some coin and the price is going down you will have a reason why you still Hodl it.
every people want their coin/token going up but we must prepare for the bad cases too.