Einstein was a Scientist .... not a business man. Those are different mindsets.
The scientist tries to improve his understanding of the world which consequently could improve the world around him.
The businessman tries to find a need within his contemporary culture and build a business around it.
So how should I guess what a genious scientist would care about common business-problems ? I don't know if you ever been to the physics department of an university ;D but I don't think they care about this approach at all .... they wanna explore and think about "currently useless" things. like "what if there is only 1 electron in the universe" ....
Besides I'm not a genious myself how should I understand someones intentions who pictured himself riding a lightwave when he was 5 or something ....
Sorry this is a nonsensical questions to me but I give it a try non the less ....
Einstein formulated the theory of relativity and his last journey was about atoms since he disliked the idea of the heisenberg uncertainty principle because "god does not roll dice..."
I would go for space exploration, something that moves humanity forward and maybe something along the lines of "warp drive" such things.
This ofc is just my projection of what I know/read about him because I don't know him at all besides through historic distortions.