It is possible that Bitcoin price reach $250k, but it will soon after that drop under $100k. Also I would speculate that more possible time frame is 24 months and not 12-18.
The same pattern as it did with its past all time highs. $250k is such a huge amount to think of and IIRC, there's one famous crypto guy that has predicted this, Tim Draper.
(
https://cointelegraph.com/news/tim-draper-doubles-down-on-his-250k-btc-prediction)
glad to see people so enthusiastic about the current price of bitcoin. this is the same as those who predict that the price of bitcoin can reach millions of dollars. however, it is possible for the price of bitcoin to reach that price, but I think they are too excited. I don't really think that the price can be reached within 1 or 2 years. in fact, there are still quite a lot of people who target the price of $ 10k - $ 20k to sell the bitcoin they have.