Gold, Silver and Money

Collectors item R2 coin

Q: I have a R2 union buildings coin. They say that it was minted to celebrate the 100th anniversary of the union buildings. After much research to verify this, I came to the conclusion that it is worth R2000. Can I sell it for R2000?

Forex trading

Q: Is fxcm.com halal or haram. It is forex. 

This is what you do in forex, buy 1 usd dollar when it is equal 2 euro dollar and sell it when it is more than 2 or equal to 3 usd dollars.

For example: I bought when it was like this, 1 USD = 2 EURO. I will sell when it becomes 1 USD = 3 EURO or more than 2 EURO.

So is it halaal or haram? Can you tell me why is it halaal or haram, and also say at the end of your answer, this "It is halaal" or "it is haram" so I can understand clearly.