With the current high inflation rate, those countries will leave no choice but to accept their fate by adopting and making bitcoins legal tender in their countries if they wanted to save their economies. Most likely it would begin when they see some major success in El Salvador and they will gonna flock to announce their sudden U-turn to cryptocurrency when they feel they have been hit hard by inflation. This is the only way they make their country stable and they will not become like other countries that suffered so much that they are about to lose their national currency and instead use other countries' currency to save their economy.