Just looking at Coinmrketcap as a recommendation from seeing so many stable coins and the most numerous is always the valuation of Tether, I don't know about the development of the previous Tether coin or Tether's struggle to create a stable coin, I definitely see that this stable coin from Tether has a lot of value. I see that there are USDC, FDUSD, DAI which are in the high rankings of coinmarketcap but in my opinion Tether is probably the safest.