According to Osho, you hoard because you’re afraid to face your innate inner emptiness (sunyata). Hoarding—of money, power, food, knowledge—is a futile attempt to stuff what is unfillable. The real transformation comes by clearly seeing this futility and accepting the emptiness; then the compulsion drops by itself, revealing emptiness as divine and home.
You keep grabbing things because you’re scared of a big, safe space inside you; once you see it can’t be filled and relax into it, the grabbing stops.