<ul data-eligibleForWebStory="true">Bitcoin is expected to face challenges in the third quarter of 2025 with historical data showing an average return of 6%.Ethereum, on the other hand, may experience increased interest from retail and institutional investors.Historical data indicates the third quarter has been challenging for Bitcoin since 2013 with an average return of 6.03%.There are concerns regarding Bitcoin's performance in Q3 due to the Federal Reserve's decision to maintain interest rates.Market sentiment indicates anticipation of Bitcoin's next bull run, but analysts suggest caution.Bitcoin's price is currently up by 3.3% in the last week, trading at $109.3k, with a monthly surge of 4.7%.The Crypto Fear & Greed Index shows an increase in greed territory, predicting a potential rise to $126k by year-end.Despite Bitcoin's challenges in Q3, Ethereum is expected to perform well with growing institutional and retail interest.BlackRock's iShares Ethereum Trust (ETHA) saw an inflow of $281.3 million in just one week, indicating rising interest in Ethereum.