When SpaceX goes public in mid-June, retail investors are expected to pile into the stock they've waited years to buy. Elon Musk is expected to allocate 30% of the IPO to retail traders, well above usual levels, according to a Reuters report.

But just because you'll soon be able to get into the stock, should you? Bulls say SpaceX has a massive total addressable market and a visionary founder with a track record of success. Bears argue the company is far too overvalued and still unprofitable.

So, would you buy shares of SpaceX on day one? We asked four market pros whether they would.