"premined" Crypto-assets on the bitcoin blockchain backed by physical goods like silver already exist now:
No, that is something you can purchase with BTC, and a massive amount of trust has to be put in their partners to ship the metals and not turn it into some type of fractional reserve system. Plus I do have an issue with the fact that they say they are willing to sell palladium for 0.0% over spot, are not transparent about shipping costs and do not seem to make a healthy enough profit to do what they seem to be doing long-term.