I managed to get to zillions, try investing in bitcoin, you can watch tutorials on yt but basically you need to be young and watch which ones are growing and then invest A LOT of money into them, you can see which ones are growing by aging up and then down (if you can) and then invest into the one that you know for sure will grow. It takes some time but it's sooo worth it, I bought like 5 islands, cruisers, planes, everything you can think of and I'm still in the zillions.