You could try what i did. I divide half of my btc for both halving and trading. If you mean trading by altcoins, it is a very good chance to buy some of it now because they are so cheap because of the upcoming halving. But remember before buying some altcoin make sure that it has a good potential and won't get scam. Do some research before buying that coin. And don't buy just one type of coin divide it to many altcoins as they say "don't put all your eggs in one basket".
Yeah that's a good choice, Buying some altcoins now is a good move because you can buy them on a cheap price and just for the price to increase.
I saw all altcoins prices down, because the effect of increasing the price of bitcoin. if you have a lot of bitcoin, maybe it is better to buy some altcoins