最新报道:A rare Casascius 100 BTC physical gold bar has sparked intense collector interest amid Bitcoin's price surge, with bids reportedly reaching $2.5 million for the limited-edition item. Minted in 2011 by early Bitcoin enthusiast Mike Caldwell, these collectibles contain private keys embedded under holograms, allowing holders to redeem the BTC value. Only 25 of the 100 BTC bars were ever produced, with most coins likely lost or destroyed over time. The renewed collector demand coincides with Bitcoin's 2023 rally above $30,000, highlighting growing nostalgia for physical crypto artifacts from Bitcoin's early days. Auction experts note these rare bars now trade at significant premiums to their underlying BTC value.