Mostly there is a lot of manipulation by the big players in the market especially in low volume coins where the big players can control the market and they can pump and dump the price according to their needs whenever they want. As far as your question regarding bots and autotrading is concerned, yes there are such services available but they are not free of risks either.
yes that's right, such manipulating activities, resulting in beginners trapped in high prices, as a result not a few who experience losses from the practice. therefore I advise you not to hold tokens or coins for too long that are not necessarily clear where the movement will go. indeed not all altcoins, but this usually occurs during the distribution of prizes, where the price of the token before and after listing will be different, because many of them are selling rather than buying.