$60K is one of those very high limits of bitcoin and quite on the edge. We are talking about nearly 18 million bitcoins in the market total and if you make it $60k than it equals to roughly one trillion dollar worth of market just for bitcoin. Is it impossible ? No it is not however is it probable? Not easily.
I mean one trillion just for bitcoin can happen but its quite at the edge of responsibility, I do not see bitcoin having like 10 trillion market cap in total anytime soon, maybe not ever and one trillion is like max it should be. All those $250k or whatever estimates of people are insanely not calculated guesses. We need more infrastructures to be built on bitcoins either to use bitcoins as payments or as assets. Like, bitcoin etf approvals and few more market giants are accepting bitcoins as mode of payments, will make these speculations easier to get realistic.