Trust, the invisible glue of human interactions, has long underpinned economic systems, social contracts, and personal relationships. Today, However, a seismic shift is underway: machines are learning to quantify, evaluate, and trade trust with a precision that rivals, and sometimes surpasses, human judgment. Powered by artificial intelligence (AI), blockchain, and decentralized systems, machines are redefining trust as a currency a measurable, tradable asset that fuels the digital economy.