I guess this was reported sometime yesterday. It did go down slightly but is now up 15% in the last 24 hours, presently over $40k as of this writing.
I don't consider Tether a crypto in the conventional sense. It's a very convenient gateway between crypto and fiat dollars and for that reason, enjoys the most transactions in the entire crypto world including bitcoin, in spite of only having about 8% of the market cap of bitcoin. Tether really demonstrates how even in the crypto world, everyone routinely considers the dollar to be a stable unit of value. I'd as soon see Tether dry up and blow away.
But there are a couple other stable coins, as they are called, to replace Tether if it goes down.