So, the article refers to the price of BTC increasing with respect to USD which lead me to think about things like investments, speculation, and currency tradin

So, the article refers to the price of BTC increasing with respect to USD which lead me to think about things like investments, speculation, and currency trading. FOREX.com is a currency exchange that enables trading USD, euros, and yen. MTGOX.com is a currency exchange that additionally supports BTC. You would open accounts with either company to trade currencies. I apologize for any confusion.