Bitcoin accumulation by whale and dolphin holders has stalled, according to CryptoQuant's May 28 report. Whale wallets, holding between 1,000 and 10,000 BTC, have shown no growth since February 2026, while dolphin addresses, with 100 to 1,000 BTC, have posted lower highs since September 2025. This stagnation in accumulation is seen as a potential precursor to Bitcoin price declines. CryptoQuant highlighted that previous reports of whale accumulation in 2026 were misleading, as much of the activity was exchange-related rather than genuine buying. The one-year change in whale holdings has turned negative, indicating distribution rather than accumulation. Despite these trends, the presence of spot Bitcoin ETFs offers a new demand channel that could influence market dynamics independently of on-chain behavior.