Compare MSTY, MSTX, MSTU, and 4x Bitcoin ETF and tell me which one should I invest and sell in near future

Given your interest in investing in the near future, it's important to consider the current performance, trends, and market sentiment surrounding these ETFs.

1. **MSTY (T-REX 2X Long Sol Daily Target ETF)**: This ETF is leveraged and targets Solana (SOL), not Bitcoin. It is not directly relevant to your interest in Bitcoin or MicroStrategy.
2. **MSTX (Defiance Daily Target 1.75X Long MSTR ETF)**: This ETF is leveraged and tracks MicroStrategy (MSTR) closely. It has seen significant inflows and has a high volatility, indicating potential for substantial returns but also risks.
3. **MSTU (T-REX 2X Long MSTR Daily Target ETF)**: This ETF is also leveraged and targets MicroStrategy (MSTR). It has experienced a 225% surge in just two weeks, suggesting strong investor confidence and potential for continued growth.
4. **4x Bitcoin ETF**: This is a hypothetical scenario, but if we consider ETFs with high leverage like MSTU, they can offer substantial returns but at increased risk. A 4x Bitcoin ETF would amplify Bitcoin's price movements, suitable for traders looking for extreme exposure.

**Investment Recommendation**:

Given your focus on Bitcoin and the near future, if you're looking for Bitcoin exposure, **MSTU** stands out due to its strong recent performance and leverage. It has captured significant investor interest and has positioned itself as a notable player in the ETF market. However, its high volatility indicates that it is suitable for traders who can handle potentially significant losses as well as gains.

If you're seeking a less volatile option with Bitcoin, you might consider **IBIT (iShares Bitcoin Trust)**, which is a non-leveraged ETF that has seen substantial inflows and has a lower expense ratio. It offers regulated and accessible exposure to Bitcoin's price movements without the extreme volatility of leveraged ETFs.

**Selling Recommendation**:

If you're looking to sell, it's important to consider the current market trends and sentiment. If Bitcoin continues its upward trend, as indicated by strong inflows into Bitcoin ETFs and speculation around the U.S. presidential election, holding onto a well-performing ETF like **MSTU** could be beneficial. However, if you're concerned about potential market corrections or wish to lock in gains, you could consider selling **MSTU** or any other Bitcoin ETF that has significantly appreciated in value.

In conclusion, if you're seeking a leveraged Bitcoin exposure with substantial potential returns but also high risk, **MSTU** might be the ETF to consider. For a more stable Bitcoin investment, **IBIT** could be a better choice. Always ensure to align your investment decisions with your risk tolerance and investment goals.