Spending money actually has a certain mystique: if you don't have money, spend some to buy things, and your luck will actually get better and better. Money is like water; it flows. Excessive frugality will definitely cause problems—only saving and not spending can easily lead to a situation where, due to certain events, you end up losing all the money you've saved up. Save and save, and a hole will be waiting. Use it, use it, and the God of Wealth will send blessings.