It's a x50 rise, not a x5.
But compared to the  1satoshi=1$ or a Lamborghini=1BTC by 2022 this might actually be doable.
Of course every geometrical growth has it's limits.
You can have two kids , your neighbor can have x3 (six in total) but if you add another x3 (18), well, that might be a problem.

But since we're talking value against $, it might be possible that in 1 years 250k$ to be worth less than 5k$ now.