Of course you can, I also trade on altcoin, I don't have Bitcoin, because the current price of bitcoin is still expensive, and in altcoin everything is still cheap, so I decided to altcoin, and I'm grateful to be profitable
Yes, there is no harm in also trading in Altcoin, but try to choose the top Altcoin so that the potential profit is always there, and set aside a little of your capital for Bitcoin even though the price of Bitcoin is still in the expensive category, but trading Bitcoin can also be profitable even with a little capital.