According to @rovercrc, US M2 money supply rose from about 12 trillion dollars in 2015 to roughly 22 trillion dollars in 2025 while Bitcoin’s maximum supply stayed fixed at 21 million, emphasizing BTC scarcity versus fiat expansion; source: @rovercrc on X. Federal Reserve data confirm a long-run increase in M2 from roughly 12 trillion dollars in 2015 to above 20 trillion dollars by 2024, validating the monetary expansion trend; source: Federal Reserve FRED M2SL. Bitcoin’s supply cap is set at 21 million by the protocol with issuance declining through programmed halvings, reinforcing the fixed-supply profile; source: Bitcoin.org. During the 2020 to 2021 liquidity surge, M2 accelerated and BTC reached record highs, illustrating how macro liquidity can coincide with Bitcoin strength; sources: Federal Reserve FRED and Yahoo Finance BTC-USD.