Stoploses very often leads to looses because in this unregulated market coins price can jump -20% in 1s to jump back to its backprice only to eat stoplosses. Atacks on stoplosses happend here every day. If you have possibility i would rather set some kind of allarm or monitor trade with "mind stoploss".
Forex, stock are regulated and -20% jump is not happening. There are also insitutional investors setting huge walls making stoplos attacks less profitable (that makes them happend less often).
It's actually a technique they use in the forex and other markets called "stop grabbing" where they clean out orders by striking stop losses before entering a larger order in the other direction. This allows them to gain further momentum with their gigantic moves and slingshot their way to profits. You can see it almost every morning on the London opening on major pairs like USD/EUR, EUR/GBP, etc.
Stop losses are necessary because they help you to calculate risk, but they absolutely need to be placed far away in crypto because of the volatility. This is why I don't really like trading crypto with leverage for long term positions. It's hard to keep yourself from getting hit.