In this interview, J.L. Collins, author of "The Simple Path to Wealth," discusses financial independence, the concept of "F.U. money," and strategies for achieving wealth. Collins advocates for saving a significant portion of income (ideally 50%) and investing primarily in a low-cost, broad-based index fund like VTSAX. He addresses common concerns about market volatility, safe withdrawal rates (the 4% rule), and the importance of flexibility in financial planning. Collins also touches on the shift from FIRE (Financial Independence, Retire Early) to FI (Financial Independence), emphasizing that the goal is optionality and freedom rather than strict retirement, and shares anecdotes and insights from his own experiences and those of others in the FI community.