Well, where will your parents be going? They are getting older. You won't have them forever.
If that doesn't spend all the money, good! You'll be needing it. Starting a new household is full of expenses. That includes minor things which add up, everything from a salt shaker to a mop.
There are some things that people just have to learn for themselves. I think your comment is well intentioned, but there are any number of reasons why this may not apply for the OP. For example, at college age, you have no concept of the impermanence of things. Additionally, some people have no parents or have a different relationship with their parents such that spending time with them would be counter to the nature of their relationship.
If that doesn't spend all the money, good! You'll be needing it. Starting a new household is full of expenses. That includes minor things which add up, everything from a salt shaker to a mop.