For men, studying creative arts, English or philosophy results in lower average earnings than if they hadn’t gone to university at all:
For women there are no subjects with negative returns, but studying creative arts increases earnings by only 9%. (For medicine it’s 75%.)
So if you want to earn more money, study the subjects on the right of the graph: economics, medicine, architecture, business, law, etc.
On the other hand, there is at least one thing that money can’t buy.