Am I losing THC

I heard if you grind your all weed up and keep it in your baggy the THC potency will drop by at least 50%.

ok here is the deal.. ,you dont want to grind the bud until you are ready to smoke it. what will happen is in a plastic baggy, the baggie has a electric charge opposite of the thc/trichomes.. thats why your baggy of weed always has crystals on the side of it.. the baggy attracts them. if you grind and put them in the baggie, a lot of the trichomes will stick to the side and you will never get them back. even if you ground the bud and put it into a jar, the stuff (trichomes and bud matter) will even separate. keep as buds til you reday to smoke then grind..