I've been reading up on stablecoins lately, mostly Dai as it seems like the most stable of the few. This is the first time I hear it being associated/connected

I've been reading up on stablecoins lately, mostly Dai as it seems like the most stable of the few. This is the first time I hear it being associated/connected to Coinbase/USDC in any way. Could you share how you're making that connection? It went right past me somehow.