Regarding whether Bitcoin will rise after the US interest rate cut and its impact on the economy, we can analyze it from the following perspectives:

1. The relationship between Bitcoin and monetary policy: Generally speaking, when the Federal Reserve adopts an interest rate cut policy, liquidity in the market will increase, which may lead investors to seek investment channels with higher returns. Since Bitcoin is considered a high-risk, high-return asset, it may attract more investors during periods of loose monetary policy, which may push up the price of Bitcoin.

2. Market expectations: The market's expectations of the Fed's interest rate cut may be reflected in the price of Bitcoin before the policy is officially implemented. If the market generally expects the Fed to cut interest rates, the price of Bitcoin may have risen before that.

3. Changes in the US dollar exchange rate: Interest rate cuts may cause the US dollar to depreciate relative to other currencies. Since Bitcoin is different from traditional currencies, it may benefit from the depreciation of the US dollar because investors may seek non-US dollar assets to avoid the impact of currency depreciation.

4. Economic environment: Interest rate cuts usually occur when economic growth slows or faces downside risks. If the interest rate cut is in response to economic weakness, then this may have a negative impact on the price of Bitcoin because economic uncertainty may reduce investors' risk appetite.

5. Risk appetite: Rate cuts may reduce investor demand for risky assets as the relative attractiveness of fixed-income investments increases. However, if rate cuts lead to increased volatility in stocks and other traditional markets, some investors may view Bitcoin as a safe-haven asset.

6. Actual economic data: The actual performance of Bitcoin prices after rate cuts will depend on a variety of factors, including economic data, market sentiment, global events, etc.