Last past months Sri Lanka's Main Bank (Bank of Ceylon) was banned cryptocurrencies in Sri Lanka. What do you think is the reason for that ?

If some nation want to progress, they will have to accept crypto.
Agree with your comments. All countries that banned Bitcoin is countries poor and small. They want to develop, but they think that Bitcoin and cryptocurrency will make their economies go down. But I hope in the future, these countries will have positive thoughts about Bitcoin
They may be warning on crypto currencies but ultimately they also do deal with crypto currencies for the better profits and it is just the profession they maintain as we could experience top ambassadors deal with already.