Over in the mainstream stock market, an 8% total return per annum, repeated indefinitely, is more of an ideal than a reality; CalPERS (the California pension sy

Over in the mainstream stock market, an 8% total return per annum, repeated indefinitely, is more of an ideal than a reality; CalPERS (the California pension system) has been completely unable to attain it. I suspect that the same is true of Silicon Valley, once you factor in the timeframe question and the high risk of failure in any single investment.