Billionaire investor Jeremy Grantham criticizes Bitcoin and broader cryptocurrency markets, arguing they are unlikely to have lasting staying power. Speaking in recent remarks reported by Decrypt and Yahoo Finance, Grantham dismisses the idea that crypto will meaningfully endure and instead predicts it will gradually lose relevance. He characterizes the potential decline as happening quietly—describing crypto “with a whimper”—rather than through a dramatic, sudden collapse. The reports present Grantham’s view as skeptical of crypto’s long-term value proposition and momentum, with no indication of a detailed alternative asset thesis in the coverage. Overall, both outlets agree on the core message: Grantham does not expect Bitcoin or crypto to remain prominent and believes their prominence will diminish over time.