On-chain metrics indicate a prolonged altcoin winter in 2025, with most altcoins experiencing a 35.5% decline year-to-date. Over the past three months, altcoin prices have plummeted by an average of 50%, with Ethereum trading at $3,299.88, BNB at $955, and Solana at $155. The decline in active wallets and transactions since mid-2025 highlights reduced liquidity and waning investor interest in altcoins, as Bitcoin continues its rally.