Bitcoin has risen for the sixth consecutive month, with a return rate of 81% in the first quarter of 2021. This is the first quarter with the highest Bitcoin return rate in history since 2013. However, as can be seen from the chart, the second quarter of the whole year was the best quarter for Bitcoin in history, with an average return of 52.9%. The article believes that if Bitcoin follows this rule, it may once again hit a record high.