One of the ways to make millions from the market is to identify and invest in early-stage companies. If the business takes off, multi-fold returns are in the offering. Of course, the risk involved is high and investors should limit portfolio exposure to these companies at 5% to 10%.One sector that’s worth researching for early-stage ideas is biotech. There are dozens of listed clinical-stage biotech stocks. If clinical trials deliver positive results and the product is commercialized, the revenue upside pot ...