Even if we go with your logic MASS is still stable at price of 0.3$ and it has strong resistance in going down from this onward. I dont think there is much loss in buying MASS at current price. Even with zero response from there development team the project is very much stable
You may accumulate MASS at current price but I dont think it will give you short term benefit rather its a long time investment. There is hardly anything coming up about this project so its price wont go up from here. Just my own analysis about this dead project.
Buy when price is down, so there is no best time to buy MASS other then right now. Its price is perhaps at its lowest and there isn't much risk involved in buying MASS at current price. If you have some extra cash sitting idle in your wallets better invest in MASS or some other coins like that which is at its lowest.