This is an old issue and I think they are hunting those people who are using bitcoin and other cryptocurrencies check the article here. But this act can't give big impact to the existence of the bitcoin. I believe that bitcoin will grow and strong in the future .If you are living in Bangladesh better to use a VPN to save your bitcoin or you can exchange it into perfect money and withdraw it in any 3rd party exchange from perfect money.

https://news.bitcoin.com/bangladesh-authorities-hunt-bitcoin-traders/