I just used changenow.io to swap 4000 ADA for BTC. It was a tad expensive ($80) but kucoin ada deposits was down for "wallet maintenance" and I was ready to pull the ripcord. It was TOTALLY anonymous, very fast, and I actually got a tiny bit *more* BTC in the swap than what they estimated. Not a total scam like some of the others I have looked into, so if you are in a pinch and can't use a regular exchange, I would say changenow.io a decent option.