* Dollar edges toward 110 yen in best month since 2016 * Euro languishes below $1.18 as pandemic fight sputters * Bitcoin buoyed as Visa latest to back cryptocurrencies * Graphic: World FX rates tmsnrt.rs/2RBWI5E By Kevin Buckland TOKYO, March 30 (Reuters) – The dollar climbed to a one-year high against the yen on Tuesday…