what do you think this movement will help both countries? will It has any bad impact on US dollar?
This clearly helps because from the start Russia had prepared this plan long ago, and why it all started when it attacked Ukraine. At that time many people thought that Russia would experience an economic crisis as a result of wasting its aggressive costs but up to now they appear to be getting stronger and more transparent in opposing the US Dollar. Meanwhile Iran in this case still doesn't like the US, which has always interfered in its affairs in the past. With Russia of course Iran will benefit because it is pushing their goal of creating a new currency with a system that is not tied to the dollar. Capitalizing on natural resources which play an important role in various countries is able to pressure them to take new payment options.
Is the US threatened? In general whether we admit it or not, we feel threatened and will lose sources of support from various countries that are moving from the dollar to the new currency that BRICS is creating. Don't think that the US is fine and is still thought to be able to cover this up.