In 2008, Paul ran a cult campaign as a libertarian, anti-Fed, anti-war Republican.
At the time, nobody in the GOP really cared about the Fed, and for the most part, Bush's wars enjoyed broad support.
Today they're Obama's wars, and the Fed is one of the most disliked institutions around, taking daily abuse even from mainstream outlets like CNBC.
It's inconceivable to think that in the GOP primary, candidates won't be asked for their position on Bernanke, quantitative easing, the role of the dollar, and of all the candidates, only Ron Paul has made a career on all these issues. In fact, after decades fighting his fight, he must be somewhat shocked that in just the last few years, his ideology has become so popular (or maybe he's shocked that it took so long).
In 2008, the GOP primary was dominated by Serious candidates like Mitt Romney and John McCain and Fred Thompson and even Rudy Giuliani. They were content to basically ignore what Ron Paul had to say. This time, they'll be fighting on HIS turf.