Bitcoin has gained 27% and Ethereum has climbed 36.59% in Q2, following a difficult Q1 for Ethereum.Historically, Q3 has been the weakest quarter for both BTC and ETH, with Q4 being Bitcoin's strongest quarter.BTC Q3 Average Return: +6.03%, BTC Q3 Median Return: -0.80%, ETH Q3 Average Return: -0.88%, ETH Q3 Median Return: +6.51%.While Q3 may see reduced upside, Q4 tends to offer renewed momentum, especially for Bitcoin.