History often has cases where the surrounding context/infrastructure/market/culture just wasn't suitable for an invention to take off--so it fails--and then somebody 5-100 years later tries something almost the same thing and it becomes a wild success and they get all the credit for it.
For example, look at the AT&T Picturephone from ~1964. [0] Even if someone from today time-traveled with the benefit of ~60 years of economic and technological hindsight... do you think a strategy of "just keep investing--somebody has to" would been enough to make the video-phone a widespread and profitable thing in any reasonable timeframe?
I'm pretty sure you'd go quite bankrupt first, just trying to stay solvent while making hundreds of other enabling-inventions and cost-savings in a wide range of fields while completely replacing global infrastructure.