u/Familiar_Fortune295

I got this guy for free at an event 8 months ago, and I don’t have an original photo but I can say he’s definitely fuller. I don’t quite understand why the bottom leaves are purple? Is he not getting enough light? Do I need to repot? He sits by the sunniest windows in my house but I’m not sure if that adequate anymore since I did get him when I lived in a super sunny apartment. I typically don’t water until I see visible wrinkling in the leaves, and when I do water I typically sink drown him.