I would be the Kind of villain that nobody knows exists.
I would be a thief in the night, become extremely rich by stealing valuables that nobody will miss. A million or so dollars from a high class New York Bank vault is something they might not even notice is gone, much less miss, a single diamond from the treasure vaults of a collector might be believed to have fallen under a rug, an art collectors most valuable pieces are likely to never even be seen by anybody and a reasonable fake will probably never be checked otherwise.
After a sufficient amount of these little midnight strolls I will form a worldwide thieves guild. We will be the Elite of our craft. Train prospective thieves, share secrets, and riches, with one another. There will be honor, it will be a game for us, nothing more than a pastime with an extremely well payoff.
We will not be motivated by politics, or an Ideal. WE will all be the ones that have seen how shitty the world is and realized that the best we can hope for is a comfortable - from cradle to grave.
We will not be Evil. Just motivated by money, there will be many in our ranks, myself included, that will give to charities or topple regimes they disagree with using their talents. We will be neutral in the world. A silent force that turns off the lights and makes everything around them seem a lot less wealthy.
Considering how long that would take though Just becoming the main character in a Saints Row game could also be fun.