Recently, there's an interesting phenomenon: more and more people are starting to take foreign currency investments seriously. The main reason is simple—Taiwan dollar fixed deposits have painfully low interest rates, while the interest rate differentials in foreign currencies are indeed attractive. Instead of letting your money depreciate sitting idle, it's better to learn how to buy and sell foreign currencies to make money.

I myself started with basic foreign currency fixed deposits. To put it simply, foreign currency investing involves earning two things: exchange rate differences and interest rate spreads. Exchange rate difference is the profit from currency fluctuations, and interest rate spread is the difference in interest rates between countries. For example, Taiwan’s fixed deposit rate is 2%, and the US is 5%, so that 3% gap is the potential profit. But there's a trap— you might earn the interest spread but lose on the exchange rate. For instance, if you exchange 33 Taiwan dollars for 1 US dollar, and the dollar depreciates to only worth 30 Taiwan dollars, even if you earn 5% interest, overall you still lose money. So initially, you must be clear whether you want to profit from interest rate spreads or from short-term exchange rate fluctuations.

Regarding investment methods, there are mainly three types. The simplest is foreign currency fixed deposits—just open an account at the bank and deposit money. It’s risk-free but offers low returns, suitable for beginners testing the waters. Foreign currency funds are more flexible, allowing buy and sell at any time, with returns between savings and fixed deposits. If you already have some experience and want higher yields, you can consider forex margin trading—that’s the real way to buy and sell foreign currencies for profit.

Forex margin trading is different from stocks; it can be traded 24 hours a day, with a T+0 mechanism, allowing you to operate various currency pairs worldwide with a small amount of margin. But leverage is a double-edged sword; it can generate substantial gains but also significant risks. My advice for beginners is not to use too high leverage—generally, below 30x is safer.

When choosing currencies, I think beginners should start with mainstream currencies. Of course, the US dollar is the first choice, but I personally favor a combination of safe-haven currencies and commodity currencies. Safe-haven currencies like the Japanese yen and Swiss franc are relatively stable, while commodity currencies like the Australian dollar and Canadian dollar are easier to grasp in terms of trend. Looking at the recent market environment, the dollar is somewhat weak, the euro is relatively strong, and the yen has fluctuations due to policy differences.

Exchange rate fluctuations are influenced by many factors—inflation, interest rates, political situations, trade conditions, and more. If you truly want to profit from buying and selling foreign currencies, you need to keep an eye on these factors constantly. I myself often follow news sites like CNBC and Bloomberg to grasp market trends.

In practical terms, my experience is: first, only trade currencies you are familiar with—don’t be fooled by the colorful variety in the market. Second, always set stop-loss and take-profit orders; this is your last line of defense to protect yourself. Third, avoid chasing highs or selling lows; wait until a trend is truly established before entering. Fourth, diversification is important—holding both US dollar fixed deposits and Australian dollar funds can hedge risks against each other.

Finally, a key point—any strategy is just empty talk if not practiced. I recommend practicing with a demo account first, which involves no real financial risk but allows you to test your strategies in a real market environment. Once you’ve truly grasped the rhythm, start with small amounts of real money. Buying and selling foreign currencies for profit sounds simple, but in practice, it requires patience and discipline.