Bot are legit unless use for scamming purposes but remember that this is only a tool and you as owner and trader will still responsible for any losses you may occur along the way using bot.
Still know your activities,never invest to currency that is only shared by others yet make your own research and judgement because in the end of the day,you can blame no one but your self.
There are bots in the pasts that are scams wherein if you avail one of those, you will not get any feature on using it. Be careful on what kind of bots that are we using because not all of it are legit and useful. I tried to use a bot before my winning rate is 70%, for me it is already high even though there are losses that I keep incurring. Many traders think that when you use trading bots, you will have automatically 100% win rate but all of it is not true and those are just misconception.