Does pot (Marijuana) get old?

Ok, I have a nice stash of weed set aside but will be unable to smoke it due to school, my questions are... 1) Will the THC disintegrate from my stash or get bad or less effective after a while, like less potent? 2) If yes to 1, how long will it take? 3) How can I make my weed preserve as long as... show more Ok, I have a nice stash of weed set aside but will be unable to smoke it due to school, my questions are...

1) Will the THC disintegrate from my stash or get bad or less effective after a while, like less potent?

2) If yes to 1, how long will it take?

3) How can I make my weed preserve as long as possible?

Right now I'm storing it in a medicine bottle protecting it from UV lights. Thanks.
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