Trading can be a source of extreme stress, especially that money is being a subject matter here. Stress could then lead to physical symptoms and emotional baggages so knowing the risk and controlling one’s emotion is really important.
It's quite easy to control this stressed, since it has to do with money. You just have to control your allocation to avoid losing control when the trades starts going against you. In trading you can't always be lucky (to put it more precisely), you can always be accurate at all times. There's will be times when you'll get it all wrong.
Now if you had invested all your capital into that trade, that's when everything begins to goes north. There'll be no reserve funds to fall back to and if you're that obsessed with trading, it could lead to seeking of loan just to recovery your losses and so doing is putting you at a disadvantages.
Firstly, borrowed funds aren't advisable to be used for trading and also revenge trading kills faster then fomo or fud.