My sister is going to ruin her life

I'm sorry if this is a bit of a rant but I am honestly so angry and worried for my sister I don't know what to do. I just graduated and got a good job. I make a lot more than her, which is a normal thing for most people. I tell her stuff I've learned from school and work like not to go into debt, to not be a stupid consumer, to invest her money rather than blow it. I've given her advice from her single guy friends, stuff I learned from reddit. I tell her to not go into student loans for college if she can't get a loan forgiveness type job. I tell her to not apply for credit cards. I tell her to not go eating out every day. I tell her to not spend money on stupid shit. I've told her everything I've learned.<br><br>She just doesn't listen. She got a credit card and spends it on eating out every day. She's going to do something stupid like drop out to be an "entrepreneur" (she has no business skills). She's going to college just to study something that won't get a good paying job and isn't eligible to student loan forgiveness. She wants to have a baby at 21. She's just 18 but it pisses me off how she doesn't listen to a word I've said. I've done everything I can, I've told her how not to ruin her life. I don't know what else to do.