CNBC's Jim Cramer explains why the stock market's recent rally creates an opportune time to make a profit. The "Mad Money" host also argues that China's crackdown on fentanyl is a concrete sign that Beijing is serious about trade talks. Later on, Cramer dissects why 5G is back in vogue on Wall Street and learns about the retail landscape with Brixmor Property Group's CEO.

It's time to take a profit and strategically sell some stocks

Traders on the floor of the New York Stock Exchange.

There's a bit too much optimism in the stock market right now, so it would be smart to do some selling, CNBC's Jim Cramer said Thursday.