It is my understanding that BRICS will be created for use by member countries, e.g. China, Russia and Iran.
BRICS is already created 17 years ago and the members are Brazil, Russia, India, China and South Africa while Iran is more like an unofficial official member!
I think this will have little impact on the cryptocurrency market. The mechanism for the creation and use of this currency between countries has not yet been determined. So it should not affect bitcoin in August or any other time. I would not pay attention to this event.
Directly it will have no impact on bitcoin. Indirectly it might.
My argument is mainly regarding dollar value since we all know that dedollarisation is happening and that has decreased the value of dollar (mostly negated by heavily increasing the interest rate as a short term remedy) and the more dollar goes down the more other currencies such as bitcoin have to go up against it.
Now with BRICS being on the brink of introducing a new currency, if they do reveal it in this month's summit, this could be the start of a much faster dedollarisation and a bigger dump of the dollar which could lead to bitcoin price going higher.
This is why I'm eagerly looking forward to see what happens since also this can technically be a significant global economic event and another step in the direction of new world order.