To be compliant with the local regulations, the Opium protocol and Opium products can’t be accessed by citizens and residents of the USA, Japan and some other jurisdictions. Although it is impossible to prevent users from the above-mentioned territories from accessing blockchain and development modules, the website and other parts of the Opium ecosystem are blocked for certain geographies. Please note that by trying to access Opium via VPN or lying about your citizenship you are breaking the law. It’s essential to understand that the parallel with traditional financial tools such as derivatives is drawn solely for a simplified explanation of Opium’s possibilities. Despite seeming similarity, DeFi tools are quite different, with their unique costs and benefits, risks and protection mechanisms. For example “call option” on a decentralized protocol may describe a financial primitive that behaves like a “call option spread” most of the time, but has some crucial differences in terms of counterparty risk (managed by blockchain), settlement asset, technological risks and underlying asset.