PayPal co-founder Max Levchin on a quest to outdo his own success

For Max Levchin, the once-shy and at times off-putting whiz kid who co-founded PayPal, his early success has become his biggest burden.

The entrepreneur and investor says he will rest only when he has another startup that matches the success of PayPal, a company that spawned some of Silicon Valley’s most notable entrepreneurs and investors and reportedly netted him about $34 million when it was sold to eBay in 2002 for $1.5 billion.