IAC/InterActiveCorp (IAC) Chairman Barry Diller said that the company is looking at a "several billion" acquisition right now."Right now we are thinking of buying something for several billion dollars that I think we can rationally buy," Diller said in an interview on CNBC.When asked what he thinks about cryptocurrency he responded, "I think it's a con."Last week, IAC stockholders approve Vimeo spin-off.