Everyone wants to make a profit from trading cryptocurrency. And there are lots of users or people in the crypto world who offered Crypto Trading Bots. Do you think it is advisable to take this kind of scheme?
Bots are tool made by developers for an investors usage, advising people to use them should be at your own knowledge level and risks
In terms of legitimacy, yes, they are legit and do exists, same with scammers

always take precautions in dealing with it, this includes author backgrounds, legit reviews and demo's