How do you know that it's expensive?
People who were buying bitcoin at 30k when it just fell from 60k were buying it cheap. People who were selling it at 20k in 2021, when it had a run up from 10k thought it to be expensive. So did many people who never owned bitcoin. They thought 25k or 30k was a good selling point after a 3x increase, but then it made another 3x.
Cheap or expensive is not a real scale that you can reference. It's a matter of perspective.
When bitcoin went to 20k for the first time I sold some of my coins because I thought it to be expensive, but when it went close to 70k and back to 20 I was buying because I thought it to be cheap and I still think so and will keep buying everything sub 20k as long as I have fiat money.