The next bull run in Bitcoin could vary depending on a variety of factors, including but not limited to the following possibilities:

Halving effect: Bitcoin's halving event usually has a certain impact on the market. After the halving, miners may reduce mining activities due to the reduction in mining rewards, which may lead to a decrease in Bitcoin supply and thus affect its price. The next Bitcoin halving is expected to occur in 2024, which may bring certain fluctuations to the Bitcoin market.

Federal Reserve Policy: The Federal Reserve’s rate hike cycle is likely to end around May 2024, which could trigger volatility in global financial markets, including the Bitcoin market.

Institutional investment: Institutional investors are likely to play an increasingly important role in the Bitcoin market. As institutions become more accepting of cryptocurrencies, their demand for Bitcoin is likely to increase, which will have a positive impact on Bitcoin's price.

Macroeconomic Environment: Changes in the macroeconomic environment may also affect the Bitcoin market. For example, if global economic growth slows or a recession occurs, it may cause the value of Bitcoin to fall. Conversely, if the global economy performs well, the price of Bitcoin may rise.

In general, the next bull run of Bitcoin may be affected by a variety of factors, including the halving effect, Fed policy, institutional investment, and the macroeconomic environment. The specific impact of these factors still needs to be analyzed and predicted based on the specific situation.