Brian Belski thinks this could be the last great bull market of his career.
"We've been very clear over the past several years that we believe that we have entered a 15- to 20-year equity bull market, [a] secular bull market," the chief investment strategist at BMO Capital Markets said Monday on CNBC's "Squawk on the Street."
"I'm getting out at the end of this one."
Investors could still see a sideways market next year, he added, especially as the markets shift toward fundamentals and away from the Fed's easy money policies, but that would be "healthy" for a long-term bull market.
Belski added that the market could weaken in the latter half of 2014 after the S&P 500 breaks 2,000, but that it should post gains at year's end.
(Read more: Cashin: Expect a 3-5 percent correction next month)