If you want to be in drone business and are looking for the next significant opportunity then perhaps you should focus on the software side of this industry.
The hardware side of this market is already overloaded. Many Chinese drone makers are already competing with the best the West has to offer (and beating them on price). In many cases, drone manufacturers have promised what they could not deliver. Several of the serious players and investors are now focusing on what new capabilities software can bring to this industry.