If you are planning to finish your BSN, PTK is very helpful for obtaining transfer scholarships. You can also use it as a plus when listing accomplishments when you're filling out scholarship applications. It also looks very good on a resume. Some chapters have their own scholarship program (depends on the school and level of your chapter). For example, when I went to college in FL, if you were a PTK member, you got a 50% discount on tuition. However, the school I go to now only gives $500 towards books for being a PTK member. So, you'll have to check with your chapter's advisor or one of the officers for details on their program.
Just bear in mind that PTK is a service-oriented organization, so you get out of it what you put in to it. Many of the chapters have a minimum required amount of service or volunteer hours to qualify for their in-house scholarship programs.