Elon Musk's private space operator, SpaceX (SPAX.PVT), released its S-1 filing this week as it plans to go public via IPO in June. The Wall Street Journal has reported that AI developer OpenAI (OPAI.PVT) is preparing to file for its own mega-IPO. As investors anticipate this mega-IPO, should they be equally cautious as they are bullish on these companies ? Portfolio Wealth Advisors president and CIO Lee Munson, Yahoo Finance Markets and Data Editor Jared Blikre, and Senior Business Reporter Ines Ferré weigh in on the wave of upcoming IPOs.