Second world countries have seen the economic powers of United State of America because of the use of dollar as their only condition for transactions and exchanges. Based on that, the US government has continue to raise the value of the dollar by increasing the value of their commodities.

So for you to get more dollars to be able to buy their expensive products and services  you have to use more of the Local currencies to get fewer dollars to access their goods and services.

For the BRIC nations, if the idea of collaborative economy is applied they can place the same value on their goods and services. So that to get the goods and services of the BRIC nations, you have to use most of your local currencies to get the BRIC currency to be able to access their goods and services.

Over time, the 3rd world nations have faced the worst economic hardships due to the continues increase in the value of dollars which is the mostly used means of exchange  therefore, they are also suggesting a common currency among the former colonies of Britain, most especially the West African currency which has been Nder the incubator for years now.

The major able is to ensure a strong competitive economy and decentralize the domination of the dollar system. I sincerely doubt whether the emergence of such currencies will weaken Bitcoin except they jointly create a virtual cryptocurrency as a support base of the paper currency.