Good point (institutional money). It's interesting that Heinz also mentioned higher allocations plans for gold by institutional investors in 2006 (don't know where he got the data). Gold market is thin; if this is true, the upward pressure on the POG may be relentless.
Another obvious factor that is probably contributing to the rise of gold is anticipation of the end of rate hikes; that's why, IMO, it might be a good idea to sell miners before the Fed ("sell the news").
I see no good reasons (except greed) to hold SMH anymore. Oversold rapidly shifted to overbought, good seasonality is almost over. I'll probably sell by the end of the week. No intention to short.