I suggest not to study copycats, this is the truth, study Bitcoin, Ethereum, and nothing else, so that you can get a longer time.
Yes I agree with your suggestion because that way we can also keep our assets safe in the event of a price drop that we don't expect because our priority is only on Bitcoin or ethereum.
I was advised some time ago to change my altcoin into Bitcoin since Bitcoin has a more stable price compared to altcoin and I did so and the result was positive those altcoins I was holding before have now dropped to almost zero in price.