The 10-year US Treasury yield just hit 4.20% - a critical technical level worth watching. This is no small matter for crypto markets. When bond yields spike, it typically reshapes how capital flows across risk assets. A 4.20% yield on government bonds becomes a key benchmark for opportunity cost calculations. If you're tracking macro conditions, this level deserves close attention - it often signals shifts in liquidity conditions and investor risk appetite that directly affect Bitcoin, Ethereum, and the broader digital asset space.