Seeing that many friends like to do short-term trading, short-term currency experts generally follow the following principles when choosing currencies:

1. Choose popular currencies:

Popular currencies usually have higher volatility and larger trading volume, making it easier to achieve short-term profits.

2. Choose potential currencies:

Potential currencies usually have better development prospects and broader application scenarios, and may have greater short-term gains.

3. Avoid junk currencies:

Junk currencies usually have no actual value and application scenarios, and are likely to plummet or return to zero, which is extremely risky.