If we want to earn profit in trading then we have to correct our choosing factor also , one of which is the currency you choose.  Sometimes we invest in a currency after seeing it go up quickly, and then soon it starts to lose.  This loss is caused by our wrong choices.  So we should always be careful in our selection and preferably invest in top 20 currencies.  Investing in top 20 currencies reduces risks and keeps your investment safe.  Investing in selected currencies with good research and accurate market information reduces your chances of loss.  Avoid investing in haste without doing your research and market analysis and make top 20 currencies your first priority.  This way you can get better results in trading and avoid losses. And can earn profit.