Vietnam is a dead end state with a dead end economy. It is a non event. The success of Bitcoin on the global stage is going to be defined by the actions of the major economies and Vietnam isn't even in the top 50.
In terms of the markets, I agree.
But in terms of adoption of Bitcoins, and Crypto-currencies in general, and increasing it's global prevalence and penetration, I think garnering its use in countries where it is already cost-prohibitive and difficult to send money (having to use services like WU and Bank-Transfers with even more corrupt banks) would behoove the community.
For a lot of these countries, a lot of their ex-pats are living in countries with major economies but have significant amount of family in their country of birth. Taking a two-prong approach in convincing people in both countries goes a go a long way in the adoption of Bitcoin.