4-15-10 Cube/Answer

It's a double and a take.  Red simply has too many market losers and potential gammons if things go well not to double, and White simply has too many chances to win if he doesn't get hit here, or if he gets hit and comes back in quickly. 

By the way, for money this is also a double as you must cube to activate gammons (Jacoby Rule).  In match play you can win a gammon without the cube, but you still double here simply because winning 4 if things go well is much "tastier" than just winning 2 or 1.