In 2021, Ryo Ishii, an employee of an insurance company under Sony, stole about 17 billion yen of public funds to buy Bitcoin. Strangely, when he was arrested, the investment had increased in value to 20.7 billion yen due to the rise in Bitcoin prices, an increase of about 20% in just seven months. This incident not only shows the huge volatility of Bitcoin prices, but also reveals the risk that it may be exploited in illegal activities. #btc