Fun fact there was a guy a little over a decade ago who got drunk and traded 7m barrels of oil futures. Not dollars, barrels. He made the price of oil jump up for a short while.
A future means that they will be created at some point in the future. Basically its an agreement to buy for a certain price in the future regardless of what the markets are doing.
Yes you said exactly that in the comment I replied to, I never argued against it I was just adding onto it. We both were talking about how unrealistic the comment further above yours was.
But I do remember a story (on daily wtf) where a lady bought coal futures and somehow forgot or didn't manage to sell, and a coal barge turned up in the river behind her office!