NWBO will only be sold when Linda Power's wants it to be and it is certainly not at anything close to present valuations. The articles of the company allow for a poison pill to be adopted should a hostile bid be made.
What valuation would she sell at? I have no idea but Novocure, the manufacturer of Optune, has a market cap. of $4.6bn. If DC-Vax-L works as well as some of us think there is no reason why NWBO shouldn't have a similar valuation. For those of you out there with high risk tolerance, a pair trade of long NWBO and short NVCER could be interesting.