In my opinion CO2 dangers are overblown.
My knowledge base is having worked at a CO2 company many moons ago before the military. Company was a branch of Air Liquide a French company. We had refrigerated liquid CO2 and dry ice machines. I got to handle a bit of dry ice.
Unless you are in a really sealed up place, with lots of CO2, and stay in there for a fairly long time, you will be fine.
That being said, I don't know about putting it in the bedroom. You might have dreams of baked bread. The bucket does put out a baked goods smell. If you smell it with your nose close, you get the beer smell.
I distill my CO2 buckets after they quit bubbling and add it to a couple of white oak barrels. The bucket contains: water, caramelized barley, rough ground yellow corn, cane sugar, and regular bakers yeast. In my grow area they almost always bubble CO2 for at least a week.