Who are they? Rambus, Spock, Plunger, Surf, Avi Gilburt, and others on this site.
There are many with lousy track records. Avoid them. Of course you have to look at their track records to be able to tell who is who.
When people like Rambus, Plunger, and Spock speak, I listen. Why? Because they identified the last bear market in PMs and identified this new bull market.