I think all USDC on Solana network deposit has been suspended by almost all top exchanges. But yes, just because of the FTX, developers and other companies still haven't stopped investing or moving forward with crypto currencies. They all know things like this will happen in the crypto market and still continues because they also know that things will eventually recover and go back to normal. In fact this is the best time for them to start as all the coins are now in "discounted" rate.