Cramer's lightning round: I want to buy Paysafe

• It's that time again! "Mad Money" host Jim Cramer rings the lightning round bell, which means he's giving his answers to callers' stock questions at rapid speed.

Keysight Technologies: "This thing has been just red hot and I really like it."

Amarin: "The only reason why you should buy it is because it's a spec ... It is not necessarily a great company."

Paysafe: "Down 10%, I want to buy."

Xilinx: "I like it."

Humanigen: "Be careful. This is a big Twitter stock ... If you want monoclonal antibody, you want Regeneron."

Transmedics: "It's very, very hard ... I don't think it's going to be a profitable business anytime soon."

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