It is not possible to choose to own a pony as they are one of the most intelligent beings to exist. Meeting a pony is a predetermined event. Even if you go out of your way to meet this creature, this event was planned out by the pony thousands of years before you were born. It’s said that every pony has a goal. That it acts in random ways to manipulate the universe itself, random values within the atoms. You do not own a pony. You do not trade a pony. A pony owns you.