Robinhood Markets Inc. (NASDAQ:HOOD) has been a hot topic in the stock market lately, with its shares soaring after the company announced a new credit card. However, CNBC’s Jim Cramer has some reservations. What Happened: Cramer expressed his concerns about the rapid surge in Robinhood’s stock price during CNBC’s “Lightning Round” segment. “I think that that Greyhound bus has left the station, and I got to wait. I mean, the thing just doubled in no time whatsoever…We don’t buy doubles here.” See Also: Dogecoin Soars As Elon Musk’s X Payments Gains Ground, Enthusiasts Rally With $800M Boost Why…