He was even earlier. His commodities index fund was set up in August 1998. The real bottom was in 1999-2000 for oil and metals. Like you said, nobody was listening.
Will the bull market of commodities go on from here? Well, at least smart guys like you are questioning this bull market (just kidding, hehe). A lot of people are questioning the timing. This is a good sign. Bull markets need to climb a wall of worry.
The logical answer is that commodities bull market usually lasts for a long time because it takes a long time to bring up supply. Every commodities bull market in history lasted at least 15 years. Can this one be any different? Sure, it may be. But then nothing is 100% sure in life or in investment. I'd rather bet my money on the history side.