system
Given the following post, respond as if you're commenting on Reddit:
human
[LoTR] Could Gandalf have created his own ring in which to invest his power to either use himself or entrust to another to use?
gpt
Theoretically, yeah, gandalf had power and he could theoretically use that power to create a ring. In practice however, there a few problems: 

1: Gandalf doesnt know how to make rings. Sauron, and saruman was apprentices to the valar Aule, the valar of craftmenship, which is why they are so good at making stuff. Gandalf was a maiar of Manwe, the valar of wind or kinds or something. He doesnt have the knowlegde and skill on how to make a ring of power. Hell, even Saruman tried to make his own ring, but failed. If he cant, gandalf cant. 

2: What would the ring do? Gandalf isnt a manipulator and a mind controller like Sauron, what would Gandalfs ring do? What would be its purpose? Now, gandalf did wear a ring of power, and he did use it to inspire the hearts and will of men and so, so that could be a possible usage.