A U.S. investor has reported the loss of $3 million worth of XRP from his digital wallet, attributing the disappearance to a security error in a hot wallet. The incident highlights ongoing concerns about the security of hot wallets, which are connected to the internet and more vulnerable to hacking compared to cold storage solutions. In other news, MicroStrategy has expanded its Bitcoin holdings by purchasing an additional 168 BTC. This acquisition is part of the company's ongoing strategy to increase its Bitcoin reserves, reinforcing its position as a major institutional holder of the cryptocurrency. Meanwhile, Japan's financial regulator is contemplating reforms that would allow banks to hold and trade Bitcoin. This potential regulatory change could significantly impact the integration of cryptocurrencies into the traditional banking sector in Japan, fostering broader adoption and acceptance.