There's a privacy stablecoin tied to the privacy coin Haven (XHV) you all may want to look into, but I still need to do more research on it. Haven even has a privacy stablecoins for both Gold (xAu) and Silver (xAg). It works by burning/minting new Haven coins for the spot price of the metal. The actual XHV coin is speculative, meaning the value goes up and down, and it is what is used to maintain stability of it's stablecoins.
https://www.coingecko.com/en/coins/haven
This technology has already been used with another coin called Reserve:
Speculative Coin: https://www.coingecko.com/en/coins/reserve-rights-token
Stablecoin: https://www.coingecko.com/en/coins/reserve
https://www.youtube.com/watch?v=SGfU_0zuuI0
https://havenprotocol.org/knowledge/xassets-a-guide/
This needs more research so I recommend you guys look into it too. I don't trust this system yet, but it will be pretty amazing it it does as it says for the long term. Private stablecoins are a game changer.
Haven is working on a Debit card for xUSD (it's stablecoin). I don't know how long this will last but it's currently under the radar of the IRS. This would be a realistic way to cash out and never have to pay taxes, but I doubt the government will stand for it once they catch wind of it.
https://www.youtube.com/watch?v=lOiaSKLI1jk
Reporting capital gains taxes on stablecoin to stablecoin is basically 0 taxes.
I don't own any Haven currently but researching it.