April 13th is the date the project will disclose more information, it is not the ICO launch date.
You expect people to trade silver on eth, the unsecure platform where no one can trust the balances, transactions, or apps to work since it's centralized? Even lead eth developer basically admitted it's centralized and unsecure
https://i.imgur.com/0dEpVld.pngTry using a real blockchain with consensus, trustless security, decentralized governance, or unstoppable apps - none of which are properties of ethereum
Gold is already traded on Ethereum via
Digix, for Silver to be traded securely it needs to use a blockchain with enough hashrate/users already like Ethereum, a new blockchain for only Silver will be less secure and can easily get attacked.