An expert on one of the world’s suddenly hot, but still mystifying, investments is the scheduled luncheon speaker at the Kiwanis Club of Longboat Key’s Jan. 18 meeting at Portofino Restaurant at the Longboat Key Club.

David Kotok, chairman and chief investment officer of Sarasota based Cumberland Advisors, will discuss Bitcoin, Blockchain and other financial topics at his 11:45 a.m. presentation.

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