She does know that once it is gone, it is gone and that she is probably a little too old to return to her former career. I'm sure she thinks she is going to be able to dazzle some old guy and get him to marry her, and then a few weeks after the wedding he suddenly turns up dead and she is rich without the drama of a divorce trial, but instead the drama of a murder trial to keep the fans interested.
Oh, yes, fans. She seems to think that everyone in America loves her. She doesn't understand of course that when you are giving money to charities, of course those people love you, but when they find out you don't have anymore money then they are polite, but distant. Kind of like her former profession. As long as you have money the fun continues, but when you run out they are looking for the next person with money.
Now, on a positive note I will say that she has managed to contribute to some organizations and charities that really are great. But still though, to just go through almost $50M in less than a year is something she might be regretting in the future.