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
Kati	KAH-tee (Finnish)	Finnish, Estonian, Hungarian
Udane	-	Basque
Gentiana	-	Albanian
Shahrivar	-	Persian Mythology
Bairre	-	Irish
Chambers	['tʃeimbəz]