Inside each person lives two wolves. One is loyal, kind, respectful, humble and open to the mystery of life. The other is greedy, jealous, hateful, afraid and blind to the wonders of life. They are in battle for your spirit. The one who wins is the one you feed.
Do you mean trading in your Euros for Dollars after a vacation, or do you mean working for a trading firm where you speculate in currencies? I have experience in the former, and I have knowledge of the latter though no direct experience.