Bitcoin accumulation addresses, which have never sold any BTC, now hold around 2.9 million BTC, according to a CryptoQuant analyst.The total amount of BTC held in these addresses has increased by almost 50% year-to-date.This trend of long-term accumulation has gained momentum in recent years, especially during price appreciation periods.If this trend continues, the total value of Bitcoin holdings in accumulation addresses could exceed 3 million BTC by the end of the year.