According to Michaël van de Poppe (@CryptoMichNL), the altcoin market has seen an 80% decrease in value this year, with sustained declines and no signs of reversal. The persistent drop, especially following high expectations for 2025, signals elevated risk for altcoin traders and highlights the need for strong risk management strategies. The lack of recovery suggests a bearish market structure, making it crucial for traders to monitor sentiment and liquidity closely as the broader crypto market, including BTC and ETH, may be impacted by ongoing altcoin weakness (Source: Michaël van de Poppe, Twitter, June 21, 2025).