Did we even need to know the particular year that Bitcoin will reach $250,000 if it will ever reach such an amount in time to come? If you want safe your till when its value will reach such an amount then just be saving it because one cannot tell when exactly it will reach such an amount.
The only time that many analyst has speculated that bitcoin will reach such amount is when the supply of bitcoin is at least 96 percent gone, by that time, bitcoin would have been getting so scarce and miners finding it too difficult to mine, while many people will be hoarding their coin, and by that time also, adoption rate would have been high and the usage of bitcoin would have been for utility purpose and not just the way we are holding it for investment alone.
We might be looking at the space of 10 years time before that can happen, and I hope that we will be patient to be able to see that happen, if many of us would not have even sold all our coin then by the time we see bitcoin reach $30000, because it would really take a strong believer of bitcoin to see that value.