Countries with their own cryptocurrency, Ecuador, China, Singapore just tested digital dollar via Ethereum blockchain, Palestine is planning to launch their own currency and and a few countries are studying the blockchain technology closely.
IMO, governments legalising bitcoins is the best way to achieve mass recognition. On the other hand, if more countries launch their own digital currencies and proclaim bitcoin as illegal then that would definitely halt bitcoins growth, but only temporarily. Banning internet is altogether on a different level than banning bitcoins. So the growth would be halted, but the internet money would bounce back.
Streisand effect.
No I do not think it will have a direct effect on Bitcoin, people will not like Bitcoin as a centralized it looses the core value if it's centralized. I personally do not like centralized Bitcoin what's the use of it. Bitcoin is left as it is it should not be touched or disturbed, and if people are smart they shall dump the centralized one and go for the decentralised one. Government should keep their hands of my Bitcoins.