Ban in Bangladesh was there even before the incident happened in India if I am not wrong so yes the people already aware of the cryptocurrencies and the profit making opportunities but due to the ban from government they need to do every trading under the radar s they won't pay any taxes for it and also traders can set premium prices due to the ban in place.
I have heard about a few incidents where cryptocurrency traders were arrested in Bangladesh. But it is a country with a population of 160 million and there are tens of thousands of users. One or two arrests are not going to discourage the traders. They have simply moved to P2P platforms and other anonymous exchanges to do trading. The Bangladesh government is going to lose tax money and that is the only outcome of this stupid move. And as far as the global cryptocurrency market is concerned, no one really cares about Bangladesh. It's such a small market.