Key PointsElon Musk's SpaceX is on track to be the largest IPO in Wall Street's history, with the company aiming for a $1.75 trillion valuation and a June 12 debut.A rule change by the Nasdaq exchange can fast-track SpaceX's inclusion in the Nasdaq-100.However, historical precedent offers several reasons that retail investors should steer clear of the stock market's buzziest IPO.10 stocks we like better than Nasdaq › The big day for Elon Musk's …