KEY POINTS
  • Jim Cramer said on CNBC's "Squawk on the Street" that the rotation into reopening stocks may have already gone too far. 
  • "The opening trade is sapping the money out of tech. I don't know how much longer it can last," he said.
  • "I look at this market and I think how long, with the Dow up 4%, can we actually say 'hey, the reopening trade is just starting,'" Cramer said.

CNBC's Jim Cramer said Thursday that he was wary of chasing after the rotation into stocks that would benefit from a quick reopening of the economy, such as travel names. 

"I'm afraid to go all in on this reopen trade since it's already had a pretty big run, but there's still some catch-ups," Cramer said on "Squawk on the Street."