High End Stuff Pack - More Expensive Items

You could start a retail or restaurant empire. As for money, yes, you do need to vault it at some point, just make a large enough bank to contain many vaults. You could set up a shop for your rich sims and add the highest mark up on prices. They could buy their furniture, art and knick knacks from there instead of the catalogue. You could donate the expensive art pieces to the museums in your neighbourhoods. Buy a lot of expensive stuff and have a day where you gift everyone you meet something expensive. Think of it as charity. Or start a yardsale with no profit, you'll get a lot less than you paid initially for stuff. There are ways to spend the money in the game. There is even the option to burn money. It would be great if we could have a banking system though, so sims could save, borrow, earn interest etc.