Cash, is physically produced and can be faked by anyone whenever they need more money. Whereas Bitcoin, stocks and online transactions, not real and automatic cannot be forged.
To overcome this, the global financial system will depend on electronic clearing that oversees every transaction to stop fraud. Because even though there is no counterfeiting of crypto currencies, there are people who can commit system fraud.
But Nakamoto claimed that he had found a way to prevent this. Simply put, Bitcoin works by converting information about each new transaction into a mathematical form, which is impossible to read or change, and then put in a permanent electronic ledger, known as blockchain. Blockchain doesn't stay in one place. It is spread across various virtual networks, producing a fast, efficient and trustworthy global electronic currency system.