And you think people will actually sell such a database publicly? If you were an investor, would you list your email publicly so every other shitcoin developer could spam your inbox asking / begging for seed funding? It does not work like that my friend. You'll have to go through proper channels.

Besides, the best investors are on linkedin. You should start there. And when & if you have the money to launch a proper promotional ad campaign, do so.
But before you go down the solicitation road, make sure what you are trying to 'sell' is worth paying attention to.