最新报道:A physical Bitcoin bar issued in 2010 by Casascius, containing 500 BTC, was recently redeemed for over $10 million after 13 years. The bar, one of only 16 such high-denomination items created by early Bitcoin enthusiast Mike Caldwell, was designed with a tamper-proof hologram to secure the private key. Its redemption marks a rare event, as most of these collectible bars remain unspent. The anonymous owner likely held the asset through Bitcoin's extreme volatility, including its 2021 peak near $69,000. Casascius bars have become prized collector's items, with unspent units sometimes selling for premiums above their Bitcoin value.