Should the U.S. be concerned that Saudi Arabia wants to join the BRICS?

Saudi Arabia is one of the most powerful countries in the world and, more importantly, it has always been the closest ally of the United State of America!!!! But now Saudi Arabia is in a cold war with these same United States!!!!
While Saudi Arabia was cutting oil production by 2 million barrels to exacerbate inflation in the U.S., Biden was threatening Saudi Arabia with unspecified consequences and even slamming the NOPEC bill for calling into question the very security of Saudi Arabia!!!!
In turn, Saudi Prince Mohammad Bin Salman made a big move that sent a shiver down the spine of the United States of America!! and that was his request to join INDIA, RUSSIA, AND CHINA the BRICS alliance!!!! Moreover,Putin announced the emergence of a new world currency, called the BRICS currency!!! and this is great news for India, Russia and China!!!
So in this case study, let's do a deep dive and try to understand,
What is exactly is this BRICS alliance??
How will Saudi Arabia entry into this alliance can the dynamics of world power?
What is Putin's idea of the BRICS currency working?
and most importantly, what are the study materials to help you better understand this critical geopolitical situation better??