Bitcoin is ahead , but altcoins often outperform it in certain cycles. When Bitcoin rallies, capital flows in, and once it slows, traders sometimes rotate into smaller tokens for higher returns. This dynamic is tracked through Bitcoin dominance.
yes we know that BTC is ahead of altcoins and it will continue to be ahead, because BTC is the first cryptocurrency in the market. I don't think there was a time altcoins perform more than BTC or maybe I have not discover decentralized currency, because since I involved myself in decentralized currency, whenever BTC is pumping in the market altcoins price will be pumping, and whenever the price of BTC is dumping, altcoins price will be dumping to prove that BTC is the king among altcoins.
Are you waiting for altcoins to perform more than BTC before you will invest in altcoins? I don't think your wish will come to reality, because the gap BTC is giving altcoins will make it not to happen in ten years to come.