I’ve always felt that my rule would be that if I had wealth, my kids would inherit it when their individually generated net worth reached $200k real dollars. If not, the grandkids would have that option (portions split over a larger denominator). This way I also know they understand the basics of saving. Any remainder after two generations goes to charity.
I intend to help my kids get through school and if we’re lucky, buy them a house. After that, they’re on their own. I intend to leave my money to other people who are not as fortunate as we are.
I would think that if it’s feasible for you, one’s kids should have enough so that they can afford to do anything, but not so much that they can afford to do nothing.