Future stable crypto ,not a future crypto this coins is only use as alternative to usd so people can trade normally without the need of having it in fiat money.  The good thing about usdt is if you have that amount in a moment that the market crash you can easily buy back the coins you want to buy. Without the needs of deposting your fiat money traders like it because in time like unexpected crash there is always a problem depositing using bank transfer and other method.