Blackstone’s Byron Wien thinks stocks will hit a rough patch early in 2014, but after that he sees them taking off. Wien tells CNBC that, with sentiment levels very high, he thinks a 10% correction is likely sometime soon as investors deal with the uncertainty of such issues as the Affordable Care Act. But later in the year he sees the market taking off, with stocks ending 2014 20% in the black. He also says he thinks economic growth will top 3% in 2014.