The year is almost in it last quarter with few months to go but for bitcoin, investing now is not too late.
It's never too late to start investing, so start now.
Besides, we can't determine whether the end of the year will be the last quarter.

There are lots of suggestions pointing to the possibility of bitcoin getting to $250k by the end of the year, how realistic is that speculation?
This is a bit unrealistic, as people are free to speculate whatever they want, but a price of $150K is much fairer.

If bitcoin can get to $250k by December, then buying now in view of getting returns by the end of the year isn't a bad investment plan. Is such a plan a good one or a red flag?
If Bitcoin reaches $250K by the end of the year, that's not a bad sign—it means you'll have a significant profit, right?
If everyone knew that, they'd all switch to Bitcoin as their investment.