The cost of heating a home goes up every winter because the greedy energy companies know that's when people are likely to consume more energy. It has little to do with supply and demand in my opinion - that's just what they try to brainwash you with:
"More people need energy, and the less of it there is to go around, the higher the price".
Yes energy is a finite thing, but there's still plenty of resources if we all learn to share. It's the damn corporates that want you to believe energy prices HAVE TO be this way.