The 19 countries are Argentina, Australia, Brazil, Canada, China, Germany, France, India, Indonesia, Italy, Japan, Mexico, Russia, Saudi Arabia, South Africa, South Korea, Turkey, the United Kingdom and the United States.
The good news is that although Bitcoins & CryptoCurrencies are already mainstream, its still not viewed as a threat to our financial society by the government.
Here's how these countries are currently reacting to CryptoCurrencies;
infomation from g20
Argentina= Neutral
Australia= Legal
Brazil=Legal
Canada= Legal
China= Temporarily Banned (Illegal)
France= Legal
Germany= Legal
India= Neutral
Indonesia= Neutral
Italy= Legal
Japan= Legal
Mexico= Restricted
Russia= Restricted (Formerly illegal till the recent unblock of 40 crypto sites)
Saudi Arabia= Restricted
South Africa= Legal
South Korea= Restricted (Formerly legal but pending regulatory action)
Turkey= Legal
UK= Legal
US= Legal
Guest Countries for 2018 G20 meeting
Chile= Legal
Jamaica = Neutral
Netherlands = Legal
Rwanda= Neutral
Senegal = Neutral
Singapore = Legal
Spain = Legal