Bitcoin Casascius Bar Bought for $500 Now Worth $10 Million

A bitcoin collector has just turned a $500 relic into a staggering $10 million reward. The prize? A rare Casascius bar loaded with nearly 100 BTC that sat untouched for over a decade. The sealed Bitcoin casascius bar contained a hidden private key that gave the owner access to a life-changing crypto fortune. What started as a physical novelty from Bitcoin’s early days is now a reminder of just how wild and rewarding crypto history can be.

A Blast From Bitcoin’s Past

Back in the early 2010s, when few outside tech forums had heard of bitcoin, a man named Mike Caldwell began minting physical coins and bars. These weren’t just trinkets. Each piece came loaded with real bitcoin sealed under a tamper-proof hologram. The project was called Casascius, and at the time, it gave people a way to hold bitcoin in their hands.

$500 → $10,000,000
In 2012, John bought a 100 BTC Casascius gold bar for $500.

A physical one. Unredeemed. Untouched.

He watched as it grew…

Eventually crossing $10 million in value.

But this year, he redeemed the private key inside for $10 Million.

Here is the full… pic.twitter.com/D1aXJxmPR8

— 0xANARCHO (@0xANARCHO) July 1, 2025

These items quickly became collectors’ gold. Caldwell stopped production in 2013 after the U.S. government warned that minting physical bitcoin could count as money transmission. Since then, Casascius bars have grown in legend and value, especially the ones with larger bitcoin amounts like this one.

Cracking Open a Fortune

The latest headline comes from a holder who decided to peel back the hologram and unlock the bar’s secret. Inside was the private key for just over one bitcoin, which they quickly moved to a secure digital wallet. Blockchain data confirms the transaction came from a known Casascius-linked address, so the story checks out.

The owner likely timed the move well. Bitcoin prices have been holding strong in the high six-figure range per coin. That means even a single Casascius bar, once seen as a cool souvenir, now holds life-changing value.

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Rarity Meets Utility

What makes these bars so special is not just the bitcoin inside. It’s the history. Collectors treat sealed Casascius items like museum pieces. The older the bar and the more bitcoin it holds, the more valuable it tends to be. Some buyers pay steep premiums to get their hands on unopened ones.

But there’s always a trade-off. Once the hologram is removed and the bitcoin is claimed, the bar becomes just a shell of its former value as a collector’s item. This owner clearly decided the bitcoin itself was the bigger prize.

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The Bigger Picture

Stories like this show how far bitcoin has come. From obscure digital tokens bought for a few bucks, to rare artifacts holding millions in value, the journey is remarkable. These physical bars are snapshots of a time when crypto was mostly underground, and holding it meant printing out paper wallets or tucking keys into novelty coins.

Today, bitcoin is traded on regulated exchanges, stored in institutional-grade custody, and discussed in central banks. But the old Casascius bars remind us that the biggest wins often come from those who were early, curious, and just a bit bold.

Could More Be Out There?

Nobody knows exactly how many of these rare bars are still sealed and forgotten. Owners have likely hidden some in safes or lost them altogether. But for those still sitting on one, stories like this might be the nudge to dig it out and run the numbers.

Whether you call it a stroke of luck or a well-timed move, turning $500 into millions is the kind of crypto story that never gets old. The discovery of a 100 BTC Bitcoin casascius bar proves that forgotten crypto assets can still change lives today.

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