Firstly, Tether is rat poison. Unfortunately, newcomers to the space identify "stable coins" = "tether" or wrongly assume that other stablecoins share similar mechanisms. There are many alternatives that operate radically differently in the nascent space. DAI is immensely exciting. Stablecoins like DAI are interesting experiments that could powerfully create new online economies. Blockchains like Ethereum are current…
It's basically a thing guaranteed by single entity that promises that if the price drops they will buy tether at personal loss.
It's as safe as any pre-crypto, single company e-currencies. All of which died.
The only thing they have going for them is that they managed to place thrmselves as currency of the crypto market.