I think this is not good and great. Hodl too many different Altcoin will make you break down your investment, and you also break down your success so you will take more risks. I think it's best to choose only 3-5 different Altcoin.
Agree with you, especially the altcoins that are suitable for short term will certainly require a lot of time allocation to monitor,
holding a lot of altcoins will not be efficient for you, and not necessarily provide greater benefits, use only a few potential altcoins,