Altcoins Buckle Under Record-Selling Pressure Amid Rising Bitcoin Dominance

The altcoin market has been experiencing record-high selling pressure since June, according to CryptoQuant analysts. The cumulative sell-side volume on major centralized exchanges (CEX) has reached a five-year high, indicating that investors are dumping their altcoins in large quantities.

Despite this, the bottom of the market is still not in sight. In fact, the past 15 months have seen consistent outpacing of buying by selling in the altcoin spot market, with no signs of a bounce or pause.

The performance of top 100 crypto assets has been dismal, with 82% posting losses in June. The average gain was 8.9%, but the median return crashed to -16.8%. Only a few tokens showed positive performance, including Velvet, which surged 1,715%.

Bitcoin's (BTC) market share is approaching its lower boundary of a range held since August 2025, and a decisive break below this level could open the path to 55.5%. This has led many traders to believe that a major capital rotation into altcoins may be imminent, but for sustainable growth, altcoins will need a shift in fundamentals and a return of buying demand.