I don't know yet if this topic has been discussed here and if it has I'm going to lock the thread.
So I believe many traders here go through this fear in their trading and I don't think it is wrong to have such feeling because you are a human with flesh and blood plus the involvement of your money hahahaha

. Yes you are permitted to fear.
I have noticed also that this fear can help you reduce lose sometimes when you fear to pull in your trade then you stay back and at the end the market would have gone against you. It means that the fear actually was to your advantage because you didn't enter an order.
The other times too, you can have the fear of not entering the market but at the end of that trade, you will realise that you would have made huge profit if you entered. This means the fear was a disadvantage to you.
I know fear and waiting can operate same time because as you have that fear not to enter you are at the same time waiting which can be both to your advantage or disadvantage.
We have the fear operating in both advantage or disadvantage to your trade.
So how has fear and waiting impacted negatively or positively to your trading experience?
As you said, it can have both types of impact on our mind it can be positive and negative, not neutral. As if I fear to take trade now in X coin and that coin pumps I will be at a loss and if it is dumped I am at a profit. But we first find out what our fear is, are we afraid of losing money? If yes, then we should not trade with money we don't care to lose, and yeah I know we are human and greedy too we don't have money that we don't care to lose even if we have billions, haha.
But if we have the knowledge, analysis, bullish market etc. on our side and we have a mindset that the trade can be profitable, we must take the risk. I was 500$ in the loss for the last 10 days, and I did not care that much because I knew if the market has taken, then it would give as well.
Recovery from the spot market is easy because you own the token you don't just lose them like future trading and I only pick those coins that are in the market for so long that they have a reputed history. I made loss and profit both, that's what trading means, I took a large trade recently, made some good profit did not book then lost it haha, now making it again, still not booked because I knew the potential before I did not see it going down again, so there is always the fear of making and losing and making idiotic decisions we can't be just perfect instead we can be progressive.