Every time we saw that when any war happened, the price of bitcoin dumped drastically. At this moment, Israel and Lebanon are in front of a strong war which can caused many destruction. On the other hand, we already watched a almost good rally on bitcoin as well as some alts. But now, according to the previous history, we know after a pump, it takes some correction.
Since we are holding some crypto, we are afraid of another big dump.

So my question is that What should we do at this moment as a small traders? Should we sell all the crypto and wait for dump??
Every time? Really? The Bitcoin price dropped several months after Russia invaded Ukraine back in 2022, so the price drop wasn't directly caused by the war. Israel started the operation in Gaza back in October 2023, but the Bitcoin price went from 27K to 73K in the months after October 2023. Your statement about every war around the world causing a BTC price drop is simply wrong.
A war between Israel and Iran might influence the BTC price for a while, but I don't believe that such war will happen.