Hold the altcoins that you have and wait for the next bull to take those back in green. Also, add some new good coins while those are also at sale prices and these should get in green soon if the bull run has started.
It seems to me that first of all you need to decide on your activities, since daily trading can bring a certain income. But the fact is that selling and earning with the help of the difference in price is necessary only for those coins that have a certain stability in price fluctuations. But since this is a kind of adventure, it is better to leave all your money for long-term storage.