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).
-20% sudden jump on forex or stocks market can really be considered as price manipulation which people behind or institutions would be subjective to be investigated but since we are talking here about crypto then those kind of percentage jumps arent rare which it do almost happen everyday,imagine how many coins in the market is being traded those kind of red long candles can really eat up stop losses.Its good to have SL but once its being hit up then its considered as loss compared on having no SL where you can still able to hold of on your current position.