...and I can't help wondering why you want to know who holds (or owns) the thing being traded? It' doesn't matter a jot - some people figure something will go up in price, others figure the price will drop, they trade their opinions without either side necessarily holding the thing they are supposedly trading. All that matters is that at any moment a price for the object can be agreed, so that traders can agree who owes what to whom. Very few people have a genuine need or garage space for tons of grains, lean hogs, or Brent crude but they trade them all the same.
I started to trade when I was 19 and this is my 3rd year trading in forex and now starting to trade gold and silver. Somehow I'm curious how actually I earn and lose my money. Who knows in the next 20 years there might be someone would ask the same question? At least I can answer (or others who read this thread). Knowledge is more precious than money. Knowledge can give you more money. Even to rob a bank need knowledge if you don't want to get caught. Some people might be rich and trade without knowing how actually he got the money. But for me, it's always better to be rich and knowledgeable.
Believe it or not, I once got into an exchange with someone on another forum who thought I was revelling in the prospect of traders losing money. I think I had made some comment about how interesting it was going to be in the market (forex) when the volatility picked up and how it was likely to shake out a lot of the new traders that had been drawn into the market during what was a period of very low volatility. The other poster said something about how a good Christian wouldn't enjoy the fact that others were losing money. Of course I immediately informed him that if he was trading retail forex then by definition there was someone on the other side of the trade losing money. I don't think I ever saw him on the forum again.
What is forex? And is there any non-retail forex (or what ever you might say)?