Many of today's unicorns have strong growth prospects, but they often have uncertain paths to profitability. : In medieval and Renaissance allegories, unicorns are rare and wild creatures that signify honesty, fidelity, purity, and healing. In the world of finance, unicorns are venture capital (VC)-backed and privately funded companies with valuations in excess of $1 billion that are no longer so rare, and may not always be so pure. And that’s something investment advisers need to be especially mindful of. Why?