While it is true there is no rule that says that you need to use a stop loss, it is my opinion that anyone that is using leverage should use it, we know the movements of bitcoin can be extreme under some circumstances, and if you are sleeping during that time or you are not giving enough attention to the markets by the time you react your losses will simply be way too big.
And sometimes even a stop loss will not be able to completely protect you, as the price can move so fast that slippage occurs and you lose more money than what you thought it was possible.
newbie traders are always impatient with what they do. they were in too much of a hurry to make a bigger profit. that's why they leverage big.
they are not playing it safe for the current market situation., lately, more and more futures traders are wrong in predicting their trades.
stop loss is also a good thing to use, but many traders ignore it. it can save us from bigger losses. but most traders are still optimistic that the market will move in the direction they predict.
I have nothing against those which expect the best possible outcome for themselves and the markets, but that is not really a way to carry yourself as a trader, since no matter how good you are no one can predict what the market will do all the time.
And we have many examples of this, I have read countless examples of people that were considered to be genius traders and that almost never lost a trade, but when the day came in which they did their losses were so massive that they never recovered from such a huge mistake.