Most people buy Bitcoin because they want to make money from it.

BRICS is just like another fiat, the value is relatively stable.

BRICS is nothing different to mobile banking or digital fiat, mobile banking exist before Bitcoin, now I don't see mobile banking or digital fiat threat Bitcoin because people use them for different purpose.

Yes, I agree with you on the fat that both will exist both on different state and with different values and purpose just like the USDT (being as stable coin) and BTC now, one can make profit or lose in little time with BTC but not in USDT but if you have money that you may not be using for donkey years you can simply use it to purchase BTC and you will have 90%  or more chances of making high gain than buying USDT...