USDC is not stable. They have long ago removed their 1 to 1 peg with the USD because it was unsustainable. They are printing money and the value is being kept up only on the speculative expectations of the market. Like all other shitcoins they can not guarantee anything when things start to go down. Noone can guarantee anything. Those shitcoins that never had any traction according to you have cost billions to the people.