In keeping with Cathie Wood's style, these picks are riskier than average. Via her ARK Innovation ETF (ARKK 1.25%), portfolio manager Cathie Wood makes a lot of biotech bets, often on companies that are at the cutting edge of innovation in science and technology. Businesses like that tend to have volatile and temperamental stocks, though investors are lured back time and time again because they offer the possibility of big returns in exchange for significant risks. Does it make sense to invest in these stoc ...