Just because a bull market is coming doesn't mean that every fund will go up. Some fund managers are paranoid, but after a year, the main increase is in those industries and concepts. It depends on whether the fund manager has the foresight in this respect, just to grasp the wind direction and hold the stocks of these good companies.
Therefore, even if the bull market comes and the market goes up, not every stock will go up, and every fund can be multiplied several times. If you are conservative, it is enough to be an index fund. If you are radical, find some active funds to invest. What are the main investment directions of fund managers in the future?