I agree with you. Although the government banned bitcoin, people in Bangladesh still use it and trade every day, I have a lot of friends in Bangladesh and in their country bitcoin and cryptocurrency are very popular, most people in them know to bitcoin. Government can ban it but they can't stop it thoroughly, there are many different ways people can use and invest in this market.
Bitcoin transactions are difficult to stop even though there is already a ban from the government, they can still take part in bitcoin investments, because trading with bitcoin does not have to go through the government like other banks so prevention from this government is ignored.
Over time the country will recognize bitcoin is the modern digital currency most used by many people in the world.