@Guka....
Leave a tub of margarine lying anywhere outside your house.
Also leave a tub of cooking oil/fat lying a distance away from the margarine tub.
Within a couple of days you will note a couple of things:
no flies,not even those pesky fruit flies will go near the margarine
many flies and the small brown/black dudus (nthingiriri) will have eaten up the cooking oil
the margarine does not rot or smell differently because it has no nutritional value. nothing will grow on it.
so.....
Even micro organisms will not a find a home to grow because it is nearly plastic.
you might as well melt your plastic paperbags and spread that on your toast.
If you have money that you expect to start using in five years,it now belongs in stocks.
When I have money, I get rid of it quickly, lest it find a way into my heart.