History always repeats itself but you never know when it does. The Bitcoin made all time high record back in 2017, the track record of BTC is that every three years it breaks it ATH record.
You had mentioned that no one would ever know but how the hell on presuming that on every 3 years Bitcoin would reach out new ATH?
It might happened in the past but doesnt mean that it would happen in the future but 20k isnt really that too far imho and we do only have 1 month
left before this year ends but i cant see that we would really able to touch that number.
Instead on stressing out yourself then better to position yourself for possible profit making opportunity.