Im in agreeing with you that we wont see Bitcoin ever drop to below 20k again. And i cant say I have always thought about the price like this.
Current price is around $33k there would need to be trillions pulled out of the total marketcap. I cant see it happening really but we never know for sure.
Do you think so because 20k is the previous ATH and theoretically bitcoin should not fall below it? This makes a certain sense, but on the one hand, bitcoin is very predictable over a long distance, but on the other hand, over short distances it can present any surprise, so I will not be surprised even if it return to 10k.