BlackRock Inc.'s Laurence D. Fink says investors will be sorry if they're not betting on China this year. Just don't stay there too long.

China's leaders are trying to aggressively reboot the economy, measures that will result in higher economic growth than many expect today, Fink said in an interview with Bloomberg Television's Erik Schatzker. The measures may create a bigger credit bubble down the road, which may ultimately burst, a risk that Fink put at 20 percent.

"I think in 2016 you'll look back and think 'I wish I was in China'," said Fink, whose firm is the world's largest asset manager, with $4.7 trillion overseen for clients. "I think the equity market will do fine this year. I'm not telling you it's a great long-term trade."