Why would one of the biggest investment banks in the world want to buy FTX's scraps?
They aren't buying FTX scraps! Goldman is actively exploring to get into crypto domain as they are seeing higher interest and queries from their investors regarding cryptos. Also they understand that the price is low and if they can get into the market at this time, the profitability will be higher. That's simple business!
Slowly all major investment banks will start exploring crypto market as it is gaining more and more popularity every single day!
They are doing what any other financial institution should be doing, which is to explore their options and if the price is right and the risk is low then they are willing to take advantage of the opportunity in front of them, we must remember that even if many financial institutions have been against bitcoin for a long time at the end they need to attend the request and wants of their customers, and if they want to explore the possibility of investing in this market then those financial institutions have to follow their wishes.