Trading bots can be beneficial if you cannot manage your trades full-time and just need some autopiloting system that still follows your rules when it comes to decision-making. Be warned though that these trading bots, while they work and help you execute trades while you're away, can still commit some errors that can cause you money. You shouldn't rely on them 100% IMO. Trading bots aren't made for passive income, it's made to execute trades on your behalf following your line of thinking. It's still controlled by you, and the commands you issue will also be the things that it will do in order to satisfy the trade.
This is why most traders rather do manual trade. They ain't 100% believe in the bots to keep customers' information confidential. And you either set something wrong with the bots and lost money in your trade, or someone (bot dev) was able to get enough information on your to manipulate your trade to get profit from it. Basically, using the bot to trade has a risk of publicly announcing what you're going to do which puts off many traders.
Maybe bot trading is good for accumulating some altcoins, doing trade repetitively (limit on each order,...) enough that you don't care about it. Else, I don't see any use for it.