Groestlcoin Soars 201%: From Mastercard to Japan, GRS Aiming for Worldwide Payments March 12, 2019 Greg Thomson Altcoins, Cryptocurrencies, Fundamental Analysis Continue Reading? Join Now! Log In Tags:groestlcoin price GRS/USD what is groestlcoin? Previous Next Author: Greg Thomson Greg Thomson is a full-time crypto writer and digital nomad. He eats ICOs for breakfast and bleeds altcoins. Wherever he lays his public key is his home.