Ten months ago, former Japanese professional baseball player Ken Takahashi launched a petition on Change.org, hoping to use XRP as the official digital currency of the 2020 Tokyo Olympic Games.
Ripple is not a cryptocurrency since it is controlled by basically one guy, not decentralised and serves only the banks. If a crypto should be accepted in the Olympics it should be Bitcoin, Bicoin Cash, Litecoin, ether or NEO/GAS.
Japan is already the country that has adopted cryptocurrencies the most, so I do not see any point in trying to make some kind of official cryptocurrency for the games, as long as people become aware of this new form of payment and this creates good publicity for cryptocurrencies in general we all win with this.