Altcoins Rally Broadly as Bitcoin Holds Near $84,000

Altcoins Rally — Altcoins surged across the board on September 25, 2026, as Bitcoin held steady near $84,000, with major sector indices posting significant gains.

Bitcoin traded at $84,342, showing little change over the previous 24 hours, according to CoinDesk data. This consolidation follows a rally from below $63,000 in August to a peak near $87,000 earlier in the week.

Compute and decentralized finance (DeFi) tokens led the advance. The CoinDesk Computing Index jumped 9.5% over 24 hours, while the DeFi Select Index rose 8.7%. These gains far outpaced the blended benchmark’s 2.5% increase. Notably, 93 of the 100 constituents in the CoinDesk 100 index rose, and the altcoin season index reached its highest level in more than three months.

The market appeared to shrug off news of a major security incident, with crypto exchange Bitget reporting a $351.6 million hack. The exchange stated its $464 million protection fund would cover the loss and that withdrawals were temporarily suspended pending a review.