In Bitcoin’s earliest days, the cryptocurrency was little more than an experiment discussed by cryptographers and technology enthusiasts. There were no major exchanges, institutional investors, or billion-dollar valuations—just a small community exploring the potential of a new form of digital money.

One of those early adopters was Norwegian engineer Kristoffer Koch, who purchased 5,000 Norwegian kroner (about $27 at the time) worth of Bitcoin in 2009 while researching encryption technologies for his master’s thesis. At the time, the purchase amounted to roughly 5,000–14,000 Bitcoin, depending on the exact valuation and exchange method available in Bitcoin’s infancy, when the cryptocurrency had little established market price.

After completing his research, Koch largely forgot about the investment. For several years, the digital wallet sat untouched as Bitcoin slowly evolved from an obscure project into a rapidly growing financial asset. It wasn’t until 2013, when media coverage of Bitcoin’s soaring price caught his attention, that he remembered the forgotten wallet and managed to recover access to it.

By then, his modest investment had appreciated into a fortune worth millions of dollars. Koch reportedly sold a portion of his holdings to purchase an apartment in one of Oslo’s wealthier neighborhoods while retaining the rest of his Bitcoin, allowing him to continue benefiting from its future appreciation.

His story quickly spread around the world and became one of the most famous examples of Bitcoin’s extraordinary rise. It illustrated just how dramatically the cryptocurrency had grown—from an experimental digital token with almost no monetary value to an asset worth tens of thousands of dollars per coin.