"We have reached the 'Fartcoin' stage of the market cycle," Einhorn wrote in an investor letter obtained by CNBC.

"It's anyone's guess as to what will happen next, but it feels like it's going to be wild," the Greenlight Capital founder ...

Greenlight Capital's David Einhorn thinks speculative behavior in ... cycle," Einhorn wrote in an investor letter obtained by CNBC. "Other than trading and speculation, it serves no other obvious ...