Altcoin season, often called “altseason,” occurs when a significant portion of altcoins, cryptocurrencies other than Bitcoin, experience rapid price increases that outpace Bitcoin’s performance. This period is characterized by a shift of investor capital from Bitcoin (BTC) into assets such as Ether (ETH), Solana (SOL), Cardano (ADA) and even smaller tokens like Dogecoin (DOGE) or Pudgy Penguins (PENGU).