This is a risky way of investing IMO, unless you are willing to hold your coins for the long term (years), and if you are happy to do that I suggest that you pick coins that you have done your research on and actually offer something to the community. I would instead recommend majoritively holding your coins in BTC keep an eye out for upcoming positive press releases and buy into coins that are due to move in the next week or so. It will minimise your risk and help to generate good returns.
Isn't the point of investing to hold your coins for years? lmao, this is obvious. Why would you say that he/she shouldn't do this? The last thing you want to do when holding lots of coins or an investment in crypto is try day trading when you don't know what you are doing.