In my opinion, there's no such thing like " stablecoin" in this world, coz as we all know the world is always in change. The so-called stablecoins created by giant companies will just make the " numbers(the prices listed on the dashboard)" stable, but not the value that coins actually have. Another thing is that, those stablecoins are somehow far from the concept of decentralization, and they maybe easily manipulated by human beings.