In the market, there are some underground investment opportunities that may bring high profits, but they are also accompanied by corresponding high risks. The following are some common high-risk investment opportunities: 1. **Cryptocurrency and blockchain projects**: Although the cryptocurrency market has experienced tremendous growth in the past few years, it is very volatile and many projects may also have bubble or fraud risks. 2. **Startup investment**: Startup investment on crowdfunding platforms often offers high returns, but most startups may fail in the end, and investors face great risks. 3. **High leverage trading**: High leverage trading in the foreign exchange, futures or contract for difference (CFD) market can bring high returns, but it can also lead to significant losses. 4. **Real estate investment**: The real estate market in some areas may be undervalued, and there may be opportunities for high returns after renovation. However, there may also be risks such as market declines and rising vacancy rates. 5. **Art and collectibles investment**: Investing in rare art, antiques or other collectibles may get high returns when the value rises, but liquidity is low and the market is more volatile. 6. **Hedge funds or private investment funds**: Some hedge funds may pursue high-risk, high-return strategies, but such investments usually require a high initial investment amount and have low liquidity. 7. **Debt investment or distressed asset investment**: Investing in non-performing loans or debt can generate high returns when the economy recovers, but may also face the risk of difficulty in repayment. 8. **Naked short selling**: Profit when the stock price falls by short selling stocks (especially those with weak fundamentals). However, the loss is theoretically unlimited and the risk is extremely high. All of the above investment opportunities should be considered carefully. It is recommended to conduct sufficient research and analysis before investing, and assess your risk tolerance. At the same time, it is recommended to consult a professional financial advisor.