Sinclair is a bit cocky, but I think that's okay in his particular niche in the business. When gold was in the 300's, he said he'd stop writing if it didn't get to $400 by a certain date - it didn't - he kept writing and I thought, "typical."
So, while I didn't give him much credit back then, I give him mountains of it now. His $1650 call is remarkably accurate given the extreme difficulty of even getting the direction of something right, much less the amount and the time. And this prediction was made a long time and many of hundreds of dollars per ounce ago - extremely impressive.