If you are looking for short term gain, then cash in profits now as the pps may go down before year end. there is a dark cloud hanging over mnkd pps and that is the financing/dilution discussions.
if you are in this for a long run, it might be worth sticking to it till FDA approval. you will be the judge of what suits you better. the potential for major profits is very high for long term investment strategy.
We don't know when there might be a partnership news in the middle of all this. but that will be a major catalyst to pps increase.