Actually in my opinion it is always best time for buying bitcoin for the long term holder. But the scenario will be kind of different for the short term trader and also who are currently investing by focusing on the next bull run . Then yes they have to take all dips for investing on bitcoin . And not only just the first quarter of 2024 I think there will be also many dips after the April so I think then also they will have the time. Investing with large amount at once wasn't good idea for me .
There are differences for those who plan long-term investments or short-term investments.
If you want to invest for the long term, maybe now is the right time because after the halving, Bitcoin prices are likely to increase (as happened in the past) and price corrections will definitely still happen, but we don't know for sure whether it will happen deeper than now or not.
And for short-term investing, there are quite a lot of aspects that must be taken into account so that they can really make a profit in a short time, with Bitcoin price movements which are quite volatile allowing anything to happen.
If investing for the long term, I think there is no harm in investing large amounts, from what happened in the past there should be no doubt.