USDtz and BTCtz follow the Collateral squared, 4:1 silo growth model of StableTez assets. 2 silos of FIAT(or BTC if we’re talking BTCtz), and 2 silos of XTZ.

This is designed to maintain stability in a superposition (that’s not a marketing term), in which both spectral ends of market confidence, not just as a function of overcollateralized value but as a function of diversity of source (some people and jurisdictions prefer off-chain collateral, others prefer the on-chain collateral).

This way it can be stated that both validating observations of diametrically opposed philosophies can nonetheless agree the culminating fact that USDtz (or another StableTez asset), is at least 100% solvent.

If you have a 0.5 BTC that you want to make USDtz you can become a minter. Though that won’t apply to most people. Most people go through exchanges.

We are also working on TEZEX tezex.io