Currently, BTC's market capitalization accounts for 57.4%, while Ethereum is at 12.1%. During the bull market of 2021, BTC's share dropped to a low of 40%, while ETH's share rose to 18.5%. Looking back at the bull market of 2021, BTC's share has been continuously increasing during the year of 2020, while its peak declined, which is the opposite for ETH. Similarly, we can look at the trend of 2017 $BTC