There are platform for pre IPO deal. However investors need to be accredited investor. Forge Global / EquityZen: These are some of the most prominent platforms. They aggregate supply from shareholders in "unicorn" startups and offer them to individual investors.
$Grab Holdings(GRAB)$ in the long run, there is value in this stock as SEA countries use grab to travel and in this region. Grab has near monopoly on the private transport model compared to Uber and other competitors