Now I have the money to buy an entire bitcoin, idk if I should do it

I bought at the top with $4,456, I had no idea what I was doing, I thought bitcoin already been here done that and now it's time for it to soar.

Then I thought $40,000-30,000 is the bottom and it went to $20,000.

I've seen the dips of this thing, and it does still look like it's the dip. I'm not sure what I should do, I am 24 years old, I make good money and will be making $100,000 soon. I would be upset to lose $20,000 but its not the end of the world.

How do I get a good idea that bitcoin has bottomed? Is there any technical analysis or research so I get a good idea? I don't want to miss the next run up.