Michael Saylor, the prominent founder of Strategy, has significantly revised his long-term Bitcoin (BTC) valuation, now predicting the digital asset will reach an astounding $21 million within the next 21 years. This updated forecast, shared during his keynote speech at the BTC Prague 2025 event on Saturday, represents a substantial increase from his earlier prediction of $13 million by 2045, made at the Bitcoin 2024 conference. Saylor, known for his unyielding bullish stance on Bitcoin, articulated this new outlook with the comment, “$21 million in 21 years,” emphasizing the unique alignment of these numbers with Bitcoin’s total supply and its historical timeline.

Saylor attributed his heightened optimism to a series of unforeseen geopolitical, regulatory, and adoption developments over the past year. He expressed surprise at the White House’s embrace and advocacy for Bitcoin, acknowledging that Donald Trump’s presidential victory in November marked a crucial political turning point. Saylor remarked that while they anticipated a pro-Bitcoin leader, they never expected the concept of a strategic Bitcoin reserve or a president aiming to make the U.S. a “Bitcoin superpower of the world.” He also highlighted recent legislative advancements in cryptocurrency regulation, including the stablecoin-focused Genius Act, the Digital Asset Market Clarity Act, and the Bitcoin Act, noting the unexpected trend of U.S. states increasingly adopting Bitcoin.

Despite his fervent bullishness, Saylor acknowledged the inherent volatility of Bitcoin, predicting significant price swings on its journey to $21 million. However, he remains confident that these fluctuations will eventually stabilize, projecting a solid 21% compound annual growth rate (CAGR) over time. He further suggested that Bitcoin is likely to continue outperforming the S&P 500 annually until 2046, reinforcing his belief in its long-term investment potential.

Beyond Saylor’s personal predictions, his company, Strategy, continues its aggressive Bitcoin acquisition strategy. The company added another $1 billion worth of BTC last week, bringing its total holdings to approximately 592,100 BTC as of June 15, 2025. Interestingly, Saylor has consistently declined to disclose how and where Strategy’s Bitcoin holdings are stored, maintaining a private stance on the specifics of their custody.

Saylor has also evolved his views on key cryptocurrency principles. Historically, he had been vocal in his disapproval of the concept of proof-of-reserves (PoR), arguing that it could compromise the security of issuers, custodians, exchanges, and investors. Similarly, he initially rejected the idea of self-custody for individuals, drawing criticism from the crypto community for seemingly advocating for traditional banking solutions. However, after facing backlash, he shifted his position in October 2024, expressing support for self-custody for individuals who are “willing and able.” This evolving perspective aligns with a growing sentiment at events like BTC Prague, where attendees, including a diverse mix of developers, Bitcoiners, and newcomers, show significant interest in open-source tools and the “be your own bank” principle of self-custody, as noted by Danny Sanders, Chief Commercial Officer at hardware wallet company Trezor.