Global Debt and Deficits Mounting: BlackRock Sees Long-Term Value in Bitcoin

As global government debt and fiscal deficits continue to rise, Bitcoin’s positioning as a scarce asset is receiving renewed attention. In its latest report, BlackRock (BLK-US) warns that if major economies fail to establish credible fiscal consolidation paths, investor concerns over currency depreciation and declining fiat purchasing power may intensify. Bitcoin, whose supply cannot be arbitrarily controlled by governments or central banks, could see its strategic allocation value rise further.

In its report titled 'Re-Underwriting Bitcoin: Still a Portfolio Diversifier After the Pullback?', BlackRock reassesses Bitcoin’s role within institutional investment portfolios. The report argues that despite Bitcoin remaining a highly volatile asset, its long-term investment rationale as a global monetary alternative and portfolio diversification tool has not fundamentally changed.

Scarcity Gains Value Amid Mounting Debt

BlackRock points out that rising government debt and fiscal deficits in the U.S. and globally are increasing market focus on long-term risks such as monetary expansion, fiat currency depreciation, and loss of purchasing power. Bitcoin’s supply is mathematically capped by code, sharing with gold the key characteristic of being immune to arbitrary increases by governments or central banks. This fixed-supply mechanism is thus one of its core investment theses.

The report reviews the long-term performance of fiat currencies, noting that major economies’ fiat currencies issued at the start of the 20th century have lost over 99% of their value when measured in gold. Some economies have even experienced repeated episodes of high inflation, hyperinflation, and currency resets.

BlackRock argues that although Bitcoin was only launched in 2009—far more recently than gold—the market has gradually formed a consensus around its role as a global monetary alternative.

Correlation with U.S. Stocks Remains Low at 0.18

Beyond currency depreciation risks, BlackRock also highlights Bitcoin’s portfolio diversification benefits. Data in the report shows that over the past decade, Bitcoin’s average correlation with the S&P 500 index was approximately 0.18. While higher than gold and U.S. investment-grade bonds, this remains significantly lower than the correlations between equities and commodities, emerging market stocks, or U.S. high-yield bonds.

BlackRock acknowledges that during periods of macro liquidity tightening, sharp declines in market risk appetite, or forced deleveraging, Bitcoin may temporarily fall in tandem with stocks. However, such increases in correlation are typically short-lived and do not indicate a structural shift in Bitcoin’s long-term diversification properties.

Additionally, Bitcoin’s monthly returns over the past decade have shown a clear 'positive skew'—meaning while large upward moves are not frequent, when they occur, the gains are often substantial. BlackRock believes this return profile, distinct from equities, could complement portfolios heavily weighted in stocks.

Allocating 1%–2% Can Transform Portfolio Performance

The report notes that while Bitcoin remains a high-volatility asset, its overall volatility has clearly declined in recent years compared to a decade ago, when annualized volatility often exceeded 100%. One reason is the maturation of Bitcoin’s market infrastructure. From perpetual futures and CME Bitcoin futures and options to U.S. spot Bitcoin ETPs and related options products, institutional investors now have more tools for arbitrage, hedging, and risk management.

BlackRock further conducted a 10-year historical backtest on a traditional 60% stocks, 40% bonds portfolio. The results show that allocating 1%–2% from the equity portion to Bitcoin historically increased both annualized returns and risk-adjusted returns, while overall risk and maximum drawdown remained close to those of the original 60/40 portfolio.

Specifically, the historical Sharpe ratio of the traditional 60/40 portfolio was 0.81, rising to 0.90 with a 1% Bitcoin allocation and further to 0.96 with a 2% allocation. Maximum drawdowns were approximately 20.3%, 20.6%, and 20.9% respectively—differences being relatively limited.

Nonetheless, BlackRock emphasizes that Bitcoin remains a high-volatility asset and does not reliably serve as a hedge during every market shock. The above results are hypothetical backtests based on historical data and do not guarantee future performance. Whether and how much investors should allocate to Bitcoin should depend on their investment objectives, risk tolerance, and regulatory requirements.