I am about to finish my second Graduate Certificate and I still don't know what I want to do when I grow up. I feel I will eventually need a Master's degree so I can teach, but I have no idea what to actually get it in because everything interests me and I have the attention span of a squirrel. Any advice is appreciated.
A degree is not a goal, it's a tool that help you reach a goal. Right now you don't have a specific goal that would call for a specific degree program... so no, you don't need one. If you decide later what you want to teach, great, then re-evaluate.
If you are looking for maximum acceptance in transfer credit for your graduate certificate courses perhaps there are distance learning programs with masters in interdisciplinary studies or the like?
Followers of the degree mill scandals, most recently in India, recognize that many people "have the degree" and seem to figure out how to fake their ways into all sorts of positions where "knowledge" would seem to be necessary. Some survive in these positions rather well until some turn of events reveals the truth, that their degree is a fake. How do they survive in these positions without having acquired the knowledge that is gained from earning a degree? I could come up with a few theories but I can't really say for sure.
From "Big Bang Theory": Bernadette (to Howard): If you don't want to get teased about that, get a doctorate. I have one, they're great!