USDT before was hack, but I think it's still safe if you want to hold your funds in USDT from cryptocurrency, other traders are still using USDT just to save their profit from what they got from trading.
I suggest you if you have a local exchange better to exchange your coins into fiat so that your funds are safe, but you can be still used USDT as an alternative, but it doesn't mean that tether is safe.
The best alternative is XRP (ripple) it is likely a tether (USDT) but ripple is much better.