According to AltcoinGordon, approximately 48,000 BTC valued at $3.6 billion were transferred into accumulation addresses on April 9, marking the largest single-day inflow since February 1, 2022, as reported by CryptoQuant. This significant movement suggests that large holders, or 'whales,' are actively accumulating Bitcoin, which could indicate bullish sentiment and potential upward pressure on BTC prices.