Slowly buying Altcoins now going into BTC halving can pay off well in the coming month in my opinion.

Adding 5-15% of the portfolio on each dip from now on wouldn't be a bad idea.

I can't suggest you Altcoins right now because the current picture of Altcoins isn't too good. But when the aim is to play for few months we have to ignore the short term noise. So find coins that performed well in past few weeks/months. RNDR , FTM and Avax can be one of few options.