I don't own much stables, a bit of USDT though, will check that now.
For trading I'm still using fiat, however with a stable it would be advantageous because I wouldn't need to declare all my trades to the tax authorities. Is there a recommended stable ? Maybe one of the Euro pegged ones ?
There's trading, and then there's withdrawing.
Most exchanges require kyc to withdraw stablecoins in substantial amounts. I think you can withdraw DAI from bitfinex without kyc, however.