The downside is that there is always risk, and you may need to be patient to see any returns.
Growth investing has helped a lot of people build wealth over time. Consider, for example, someone who invested in Apple or Amazon stock in the early years — many people put kids through college or funded their own retirement on those investments. That's the biggest benefit of this strategy. The downside is that there is always risk, and you may need to be patient to see any returns.