A realistic, highly detailed 4K image of a muscular, lean Highland Cow bull, with a powerful, athletic build. The bull is intensely strong, with defined muscles and a fierce, aggressive expression. Its body is sleek and well- toned, showcasing powerful muscles without being bulky or fat. The bull is adorned with ornate gold decorations along its body, symbolizing strength and dominance. Its eyes blaze with green flames, signifying the unstoppable energy of the bullish market. A prominent BTC coin symbol is engraved in the center of its forehead, glowing brightly. The bull’s long, sharp horns curve menacingly, adding to its aggressive appearance. As it charges forward, green flames erupt from its hooves, leaving a fiery trail with thick smoke swirling around. The background is dark and dramatic, with a green theme that emphasizes the bull's strength, determination, and the power of Bitcoin's rise