German firm told to wind up cryptocoin business after pyramid scheme claims

Karatbars used former football stars Lothar Matthäus, Roberto Carlos and Patrick Kluivert to promote productsA German cryptocurrency company that used the former football stars Lothar Matthäus, Roberto Carlos and Patrick Kluivert to promote its products has been ordered by a German watchdog to wind up its blockchain-based business after allegations it was luring customers into a pyramid scheme.Karatbars, founded by a Stuttgart-born former vacuum cleaner salesman, Harald Seiz, in 2011,