During August 2013, Madeline invests $400,000 in Qual Company, Inc., buying 100,000 shares of stock. Her broker tells her this will be an excellent investment because the securities are qualified small business stock. He predicts the stock will triple in value over the next three years. At the end of 2017, Madeline's shares are valued at $700,000. Madeline is encouraged. She decides to cash out of this investment in December 2018 if the stock continues to appreciate. Madeline comes to you for advice. Write a letter advising her what she should do.