I say go for it. It looks like it's growing great and it will fill it up surprisingly quick. Love the peristome shape on this guy.I'm thinking it's getting close to repoting this plant. It's currently in a 7inch pot and the truncata is growing low and starting to overhang the pot its in. I think it's eventually become heavy on one side and fall over.
I'm not sure what size I should upgrade to. 7inch to gallon? Would that be too big of a jump? This truncata drinks a lot so the current media dries out pretty fast.