Cinnamon 
has been used for ages in home and in spiritual work, while there are MANY reasons & ways to use Cinnamon here are a few. 
-For Protection ~ by boiling it and making adding it to a spray bottle, by bundling it and hanging the bundle in your home etc. 
-For Abundance ~ carrying cinnamon in or near your purse/wallet, burning at the start of the month 
-For Smudging - similar use to Sage/Palo Santo
-For Drinking - many people use Cinnamon and other herbs to make teas for spiritual and health purposes 
-For Manifesting - many people use Cinnamon Blowing methods to increase prosperity and abundance or wish/manifestation making!
Be careful as to how often you use/burn it as too much can make you feel sick. I personally do not advised carrying/nursing mommies to use cinnamon.