altcoin price movements are affected by bitcoin prices. bitcoin is currently stuck at $ 7,000- $ 7300. and no other major changes. if you are a strong coin holder. then investing in the coins you mentioned is good.
For me that is the right thing to do, so I agree with you on that 100%.
but if you are a day trader, choose coins that have fast changes. therefore not affected by the price of bitcoin.
It's easy to find this, look for an exchange with a good trading volume on a daily basis and you can trade the coins in short term.
I think as of now, Binance is the most favorites exchange in the market, so look for coins in Binance that are undervalued currently that you think will bounce back.