The market landscape shows a majority of investors are confused after the U.K. vote to leave the European Union, but Tom Lee, co-founder of Fundstrat Global Advisors, said Tuesday that this may not be a bad thing.

"I think it shows that maybe the markets are a lot less invested than people think. My takeaway is that there's a lot more cash on the sidelines," Lee told CNBC's "Squawk Box." "That's why we had a huge sell-off and we were able to recover most of that decline."