Of course there are money bags that are going to come in just before the halving. They are probably waiting for the late minutes to DCA in expectation to ride the halving bull and this has been the tradition of bitcoin whales. They want to jump in late hours and cause the market to change directional flow. This will also affect the altcoins market as well. I remember the last halving, some altcoins took that moment to ATH.
When bitcoin is in a bullish trend, of course the altcoin market will follow suit. So far, the price of bitcoin has always influenced the price of altcoins, of course this correlation seems natural considering that bitcoin and investor confidence in it can be used as a benchmark for the future potential of cryptocurrency.
Investors may be patient and waiting for the right time to invest their money in bitcoin, but some of them seem to have stepped in since last year when bitcoin was still under $20k. If they expect the bitcoin price to drop lower than $20k this year then I think they will just regret the decision because I don't think the bitcoin price will correct that low again.