Mario Tama/Getty ImagesSpaceX's IPO may lead to liquidity issues as investors shift funds from existing stocks.Tech sector reweighting could cause outflows from Apple, Nvidia, and Microsoft shares.Experts suggest diversifying portfolios to mitigate concentration risks and market shifts.Earlier this week, we explored whether the IPO boom, led by SpaceX, is a sign that the market environment that's getting a bit too frothy. In keeping with the IPO…