Where can I buy THETA fuel?

Excuse me, as a keen follower of cryptocurrency trends, I've been hearing quite a bit about THETA fuel lately. Could you possibly provide some insight on where I might be able to acquire this particular digital asset? I've done some research but am still unsure of the most reliable platforms or exchanges to turn to. I'm looking for a secure and trustworthy source that offers competitive rates and a smooth transaction process. Any recommendations or advice you could offer would be greatly appreciated. Thank you for your time and assistance in this matter.