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
Joosep	-	Estonian
Elihu	i-LIE-hyoo (English), ee-LIE-hyoo (English)	Biblical, Biblical Hebrew, English (Archaic)
Dominique	['dɔmini:k]
Hogan	['həugən]
Osheen	-	Irish
Iser	-	Yiddish