Chase UR Virgin Atlantic bonus transfer

Is it worthwhile to speculate transfer some UR points to VS flying Club to take advantage of the 40% transfer bonus before it expires at the end of November? I've already booked a trip to/from LHR on VS biz class using the bonus transfer. My next trip is likely US West Coast to Asia but I haven't seen any good biz class availability using VS points. It does't appear that you can book Delta flights to Asia using Virgin, right? I have about 200K UR points to use and another 200K Alaska miles. Is it better to keep those points for use on other airlines that have more Asia flights? Seems that 40% bonus is a good deal and VS dynamic pricing is good for people with some flexibility in travel. How often do these type of bonus transfer occur? On the other hand, I probably can always use the VS points for European trips in the future if I couldn't use them for Asia.