A former Estonian prime minister has signed on as an advisor to a blockchain startup that wants to encourage people to exercise more. Taavi Rõivas, who ran the Estonian government as prime minister from 2014 to 2016 and currently serves as a member of the country’s parliament, has joined cryptocurrency startup Lympo as chairman of its supervisory board. Lympo aims to incentive exercise and active lifestyles through its LYM token, the company announced in a press release. Rõivas confirmed the move on Twitter, saying that he was “excited to help…