I try to teach my kids two lessons around money. One, don't spend all of your money. Save some of it. Basically get in the habit of having some amount of money without feeling the need to spend it. Two, when you do have an amount of money that you're not spending, invest it with broad diversification. That lesson is obviously are more complex one that comes later, but it's a likewise important piece. Both to avoid the money inflating away, but also to avoid conflating the ideas of investment and speculation.