I think the right position to buy bitcoin is even more. You can open orders at the price of $ 6000 because I think it is very difficult now to be able to reduce prices to $ 5500 again.
Price is unpredictable so hard to judge the current condition of btc price. It may go lower or this time a little increase of price to happen. Yes buy when able to invest at this current rate.
Bitcoin price ins't unpredictable. Bitcoin follow certain patterns shown by past market events. Of course these patterns aren't clear most of the time. So you will get it wrong many times.
But if you only go to the market when you have a plan AND an exit plan and you jump out when your plan is ruined, you will make money. Because there will be many times when things will go according to the plan.