The scarcity of Bitcoin itself is well known, but a parallel scarcity story has been unfolding for years around a unique physical embodiment of the cryptocurrency: Casascius physical bitcoins. As of September 18, 2021, fewer than 20,000 of these iconic coins and bars remain active, holding a combined 43,000 BTC — worth over $2 billion at the time.
The Origin and Forced Halt of Casascius
Created by Mike Caldwell between 2011 and 2013, each Casascius coin features a tamper-evident holographic sticker that conceals the private key for a preloaded amount of Bitcoin. Caldwell minted approximately 27,920 of these physical bitcoins across three series: Series 1 (1 to 1,000 BTC), Series 2 (0.5 to 500 BTC), and Series 3 (0.5 to 1 BTC) plus DIY storage bars. However, the U.S. government's regulatory pressure forced Caldwell to stop production in late 2013, making every Casascius coin a fixed, irreplaceable artifact of Bitcoin's early history.
Peeling Statistics and Remaining Value
According to data tracked by casasciustracker.com, as of September 2021, 8,009 coins or bars had been redeemed (or "peeled"), representing 48,169 BTC spent — valued at roughly $2.3 billion. The remaining 19,920 active pieces hold 43,000 BTC worth $2 billion. Among the most legendary items, only 2 of the six 1,000 BTC Series 1 coins have been peeled, leaving four untouched. Meanwhile, 14 of the 16 Series 1 1,000 BTC bars have been redeemed (87.5%), and 47 of the 81 Series 2 100 BTC coins (worth $4.8 million each) have been spent, leaving 34 still loaded.
Peeled Casascius coins still command high premiums in the collectors’ market. A single empty 2012 aluminum coin recently sold for $1,999, while a 2013 silver Casascius coin containing 0.1 BTC (then worth $4,834) was listed at $20,000. A rare full set of 125 aluminum Casascius coins — all already peeled — carried a price tag of $4,995.
Why Casascius Matters Today
Casascius physical bitcoins represent a fusion of digital and physical rarity. Their diminishing count — fewer than 20,000 active pieces — mirrors Bitcoin's own finite supply but adds tangible, historical collectibility. As the crypto ecosystem matures, these relics from the early days of Bitcoin are increasingly sought after by both investors and museums. Whether appreciated for their numismatic value or as a hedge against digital abstraction, Casascius coins remain a testament to the creativity and challenges of Bitcoin adoption.
Data in this article is based on casasciustracker.com and reporting by Bitcoin.com News as of September 2021.