The chase for yield, as interest rates fall, is one of the biggest risks for investors - especially retirees who depend upon their capital to live. They're the ones who can least afford to drop too much capital on ill-conceived investment strategies. The other risk is the influx of first time investors via new broking services offering cheap transactions. Any service that encourages share investment is a good thing ... so long as those entering are conscious of the risk. Most of those chasing tech companies, I think ... are ignorant of the risks.