Bitcoin whales have significantly increased their holdings, adding over $23 billion worth of Bitcoin in the past 30 days, according to data from Glassnode. During this period, whale wallets received a total of 269,822 BTC, while 403,000 BTC were withdrawn from exchanges, marking the largest monthly accumulation in 13 years. This substantial accumulation by whales suggests a potential supply shock in the market, which could lead to a trend reversal. The movement of such large amounts of Bitcoin from exchanges to private wallets often indicates a long-term bullish sentiment among major holders.