Rick Rule built his multi-million-dollar fortune primarily through a lifelong career specializing in natural resource investing, mining finance, and stock speculation. Entering the securities industry in the 1970s, he capitalized on major commodity booms and later founded Global Resource Investments, a boutique brokerage firm focused on energy and mining equities. His wealth compounded significantly when he sold his enterprise to billionaire Eric Sprott's firm, where he served as President and CEO of Sprott U.S. Holdings, complemented by decades of successful private placements, long-term asset positioning, and disciplined value speculation in undervalued natural resource sectors.