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Tether is also going down compared to USD, so it's not really helpful.

We need a currency that has -100% correlation with BTC, or alteast as close to 100% in the absolute value, but actually negative correlation.

What is your take on vaultoro?

Well it's not decentralized. And I think they store gold in switzerland, which is becoming less and less banking friendly, as their new banking laws take place.

I dont know, I own some gold and store it at a local non-banking vault, I think that is the best method to keep your gold, as close to you physically as possible but still secure.