Bitcoin's net outflow from centralized exchanges has reached nearly 100,000 BTC over the past 30 days, according to crypto market analyst Axel. The net outflow peaked at -300,000 BTC on March 25 and currently stands at -98,000 BTC as of April 21. During this period, exchange reserves have decreased from 2.786 million BTC to 2.681 million BTC, marking a seven-week decline totaling over 105,000 BTC. The continued outflow and lack of panic inflows during April's price correction indicate that Bitcoin is being accumulated by long-term holders. This trend is seen as a synchronized accumulation signal, although there is caution about the potential for net flows to turn positive again.