Condition: You can only spend it in the film industry and cannot reap any profits or fame from it (you have to do everything from the background without getting any limelight).
An example would be like, "I would produce and back 5 solid women centric films" or "Would make films only with outsiders" or "Would host my own awards show and give awards to the real deserving people" etc.
Edit to add: Any profits you may make from your investments will have to be re-invested. For example, if you invest 100 crore in making 5 women centric films and 2 of them flop, but overall you end up making 160 crores, you will have to re-invest it into the same thing.
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