sixty-four-dollar question

Fig. the most important question; the question that everyone wants to know the answer to. Who will win? Now, that is the sixty-four-dollar question. Now for the sixty-four-dollar question. What's the stock market going to do this year?

Common Names:

Name	Pronounced	Usage
Radulf	-	Ancient Germanic
Beti	-	Macedonian
CristiÁN	kree-STYAHN	Spanish
Adorinda	ah-do-REEN-dah	Esperanto
Yorick	YAWR-ik (English), YAW-rik (Dutch), YO-rik (Dutch)	Literature, English, Dutch
Larkin	['la:kin]