You will need
  • Basic knowledge of Economics
To keep currency at home.

The simplest case of earnings implies the expectation of a sharp jump of the course. So to earn on exchange rates possible, but to keep the money in this way may result in your trouble. For example, any currency tends to depreciate due to inflation, and if a sharp rise will not be, the currency will simply lose the price. Also note that the exchange rate is always higher.
To put currency in a Bank Deposit.

This way to earn on exchange rates can be due to the accrued interest on the Deposit. One of the advantages is reliability. At the moment there is the opportunity to invest in the so-called multi-input, implying diversification and separation of funds for different currencies. Therefore, if one currency falls dramatically, then the probability of the appreciation of other currencies increases.

Earn on Forex (Forex).
On Forex high risk, and decent profit. This kind of earnings is suitable for professionals who study and work on the exchange for any one year.
How to make money on exchange rates
To buy Eurobonds.

The analogue of this securities Bank Deposit are also charged interest, but the guarantee in this case is not a Bank, and the state. The only big minus to enter the market, you must have a minimum of 100 thousand euros.
Investing in futures and options.

Buying a futures or option contract, the purchaser agrees to purchase any goods (in this case currency). This kind of earnings requires constant monitoring of the economic news. In such a way to make money on exchange rates and choose the right strategy and constantly it to watch. By investing in this project can earn good money.
How to make money on exchange rates