BTC dominance perpetual futures are an interesting trading instrument. Currently, some exchanges have similar products built using a basket of mainstream altcoins, and this approach is indeed feasible. If an independent BTC dominance index futures contract could be developed, or if existing basket construction methods were directly reused, it would likely attract many traders who conduct market structure analysis. This type of index derivatives helps track macroeconomic capital flows in the crypto market very well, especially during bull-bear transition phases, providing clearer reflection of rotation cycles between mainstream coins and altcoins.