A handful of the indicators that forecast Bitcoin's (CRYPTO: BTC) biggest moves track the raw volume of money sloshing through the global financial system. When capital is abundant and cheap, Bitcoin has historically been among the first assets to rally, but when liquidity dries up, it's often among the first to fall. With that in mind, let's take a look at three of the most important signals to watch to understand when the conditions are favorable for Bitcoin to run.
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Global M2 is near $101 trillion, with its three-month growth rate at an elevated 4.3%. Historically, Bitcoin bull markets have aligned with periods of accelerating M2 expansion. The catch is that since mid-2025, Bitcoin's price action has decoupled from M2 growth, perhaps as a result of increasing ownership by financial institutions; it's presently unclear if the relationship is permanently decoupled.
The smarter signal to watch isn't M2's absolute level but its rate of acceleration and which central banks are driving it. If U.S. and European M2 begin growing faster, that capital is more likely to reach Bitcoin through institutional channels like spot Bitcoin exchange-traded funds (ETFs). Bank reserves, which are the deposits banks hold at a country's central bank, are a big determinant in how much liquidity the financial system has to deploy.
When a central bank like the U.S. Federal Reserve expands its balance sheet by purchasing securities, it injects fresh reserves into the banking system, thereby loosening the prevailing financial conditions and making it cheaper for institutions to borrow and subsequently invest in risk assets like Bitcoin. The reverse process, quantitative tightening (QT), drains reserves and constrains that flow.
Reserve balances at the Federal Reserve were $3.1 trillion in early April, while the Fed's total balance sheet was approximately $6.7 trillion, which is down by $33 billion compared to a year ago. That fairly mild shrinkage is a headwind for Bitcoin's liquidity in the U.S. even though other central banks are moving in the opposite direction. The price of energy factors into the prices of most goods and services.
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