hello,
is it worth to invest in automatic trading bot for trading altcoins at exchange sites?
thanks

I don't think that trading bot for altcoins are profitable. It is not still profitable instead much better to do trade manually, It may only give profit but not enough earnings for sure.
Most of the commercial bots in the market today are losing money in altcoins trading. I do prefer manual trading compared to bots. I do advise people to develop their trading skills and understanding on how trade work and focus on it until they succeeded in it. Trading is a game of common sense and you have to understand the rule to play The game and bots has no understanding.