One can run the numbers of course, but imagine you sign a 5 year pro contract for say $40 million, and that's it, you get injured whatever.
Now, you are 26-27 years old and have something around $25 million after taxes and fees and whatever. But you are looking at another 60-70 years of life. You should be in good shape IF you manage it properly, but of course that is a large IF.
So, you might need to get a job. For one thing, as Malcolm Forbes once said, the only think a man can do for 8 hours a day is work. I don't really agree, but he said it. A job with a degree from Stanford is probably going to be better than a job with no degree from UGA.