Bitcoin Magazine Billionaire Investor Jeremy Grantham: Bitcoin Will ‘Dwindle Away With a Whimper’ Legendary investor Jeremy Grantham — co-founder of asset management firm GMO and one of Wall Street’s most prominent bubble-spotters — came at Bitcoin again on Friday, calling the asset a “useless, speculative mechanism” destined for slow decline into irrelevance. Speaking on CNBC’s Squawk Box, Grantham predicted that Bitcoin will “dwindle away, I suspect — not with a bang, but a whimper.” He said he has never owned Bitcoin and believes it will fall to zero, not through a sudden crash but through a gradual erosion of interest over years and decades. “All Bitcoin does is allow fraudsters to move money around,” he said. Grantham pointed to Bitcoin’s instability as evidence against its status as a store of value. The coin “halved for no particular reason in a strong economy,” he noted — a critique with fresh teeth given where Bitcoin stands today. Gold, he added, has delivered solid gains over the same period. Perhaps Grantham is right, the selloff has been severe. BTC hit an all-time high near $126,000 in October 2025. Since then, the digital asset has shed more than 50% of its value. As of Friday, BTC traded in the $60,000 range, testing what analysts consider a critical support zone that, if broken, could open a path to the $40,000s. Bitcoin fell toward $62,000 in mid-June as hawkish signals from the Federal Reserve spooked risk markets. Rising U.S.–Iran geopolitical tensions sent oil prices higher and reignited inflation fears, pushing Fed officials to abandon any talk of rate cuts — with some floating the possibility of rate hikes. U.S. spot BTC ETFs posted four consecutive days of net outflows totaling around $113.8 million. Bitcoin’s attempt to reclaim higher ground ran straight into its 200-day moving average, which served as hard resistance and triggered a roughly 30% decline from that ceiling. The current drawdown is among the 5th worst in Bitcoin’s history — territory that tests the resolve of long-term holders. Some institutional buyers, however, are treating the dip as an entry point, with Coinbase reporting that major institutions have stepped in to buy the crash. Another billionaire bets big on bitcoin On the flip side, Mexican billionaire Ricardo Salinas Pliego has placed 70% of his investment portfolio into BTC — up from just 10% in 2020 — and has even convinced his wife to mortgage their home to buy more. The founder of Grupo Salinas traces his skepticism of fiat currency to family dinner table conversations about Nixon ending the gold standard, and views Bitcoin as superior to both cash and gold because it is unseizable and borderless. His conviction has survived a $150 million loan scam, regulatory pushback on his plans to make Banco Azteca Mexico’s first Bitcoin-accepting bank, and multiple market cycles. He recently pointed to a decade of London property prices as proof of his thesis — a home that cost 4,000 BTC in 2016 now costs fewer than 30 — and urges ordinary investors to convert their home equity into BTC exposure, calling it “an asymmetrical bet to the upside.” This post Billionaire Investor Jeremy Grantham: Bitcoin Will ‘Dwindle Away With a Whimper’ first appeared on Bitcoin Magazine and is written by Micah Zimmerman.