Sheldon: Speaking of something I find interesting, did anyone read that article about Bitcoin I sent you?
Howard: Yeah, I can't believe a single Bitcoin is worth about $5,000 now.
Leonard: Wait, didn't we mine some a few years ago?
Sheldon: It was seven years ago.
Howard: Oh, yeah, I remember that.
Raj: Really? All I can remember from seven years ago is I couldn't get Kesha's "Tik Tok" out of my head.
"Tik Tok, on the clock" Whoa, welcome home, Kesha.