But if the technology is not ready to be implemented yet, was it really a genius level idea?

Here’s my idea: instant teleportation.

I expect to be credited

I think that's kind of the point: there are no "genius ideas", at least not at the level and frequency popularly portrayed. If teleportation isn't feasible then the idea isn't genius. If teleportation is feasible, then using it for transporting humans isn't genius, it's incredibly obvious.

Or to give a real-world example: The Wright brothers did some great work on making aircraft steerable and doing wind-tunnel tests, but working planes were mostly a product of ICE engines finally reaching sufficient power-to-weight ratios, not of the Wright brothers being unique geniuses. In a long line of people trying to build heavier-than-air aircraft they were simply the first to have access to the necessary technology to make it work