You should wait for the crash at its price as low as possible from it's current price in order to acquire more bitcoin when buying bitcoin using the budget you mentioned or not. If you cannot wait for the price to decrease then you can buy portion by portion until you accumulate the amount you wanted. If you are not aware of it then you can make your own research about how DCA works and what's the best way to do it.
But how far will Bitcoin price correct and where will this correction end? What will be the lowest bottom? I don't think any of us can predict the bottom of bitcoin in this correction.
The fact that we cannot predict bitcoin price already answers the OP's question. As many people here says that the best time to buy is anytime, I can agree that bitcoin is a great investment if you want your money to sleep for a very long time.
Admittedly, investing in bitcoin is difficult at the moment. Waiting is also not a wise decision as bitcoin price can continue to increase at any time but buying now is also risky as the opposite scenario can also happen. In my opinion, ideally anyone looking to invest at this point should use the DCA strategy. Don't think too much and hesitate because no one can know how bitcoin will move in the coming days.
The price is too high atm. It is not easy to buy during this time as it might be a regret in a couple months from now, we know how the market behaves and one piece of advice that I can give is buy when you want to, or when you think the price is the lowest where you can afford to lose for months til it run bullish again.