@ze @Tfmonkey
On which blockhain? Ethereum is permissionless and public, making it impossible to implement private DeFi applications.

Let's make it more concrete: on which blockchain can I currently execute a private smart contract where I can order sensitive pharmacy drugs to a physical address? Off-chain, and without doxxing me to anyone with blockchain analysis tools?

Note:
1. the only currency I know that meets these criteria is Monero.
2. Torndao Cash was made illegal by the Treasury