This document discusses frameworks for entrepreneurs and investors to assess market opportunities. It begins by summarizing four case studies of different companies: ProCom, which was bootstrapped and raised funding but has not exited; Oxiden, which raised funding but failed after 4 years; Darian Holdings, which found success after an acquisition; and Glencoren, which took a long time to raise funding and have products reach the market. It then discusses common points of confusion around market versus industry, macro versus micro factors, and what is truly important about entrepreneurial teams. Finally, it introduces the "Seven Domains of Attractive Opportunities" framework to holistically evaluate opportunities across market, industry, and team factors.