As a freelancer on Upwork, do you prefer a one-time payment contract or milestones?

[Btaliat]

To be honest, there is none among this options that are not better. There are some freelancers that always love one-time payment and don't really fancy having any close relationship. There are some that want continuity. They always wish the contracts continues between them and the clients. Some will just want to have a big clients that can just give them a life-changing task. Which one do you prefer and why? Share it in the comment session for others to know.