The biggest headwind to massive wealth creation from equities is not lack of good businesses. It’s lack of patience to hold after a good idea has been discovered. Legendary investors have not created wealth overnight.While trading and speculation can deliver healthy returns in quick time, millionaires are made by buying and holding quality ideas. The focus of this column is on growth stocks under $20 that can deliver multi-bagger returns by the end of the decade.Besides looking at stocks under $20, I have f ...