Martine is working with Ishmail, her financial advisor, to develop her client investor profile. In her overall risk profiling, it was determined that Martine could tolerate an asset allocation of up to 70% of her portfolio. She currently has a goal of saving for a down payment for her first home, saving for her young children's education and retirement. Ishmail uses a one-fund strategy for all his client accounts - Martine would be allocated the "growth" fund to all her investments and savings under his management. What should be Martine's most significant risk in using this strategy at this stage?