Bitcoin is an experimental transfer system.Much of its work was done in late 2008, as the financial crisis began.
Bitcoins are used as a direct online payment method.Such a design makes it the most sophisticated, accessible and transparent currency.
A special program - called a "wallet" is required to be able to access and use its cryptos.
ledger is a hardware wallet.
two differrent wallet:ledger nano s and ledger nano x
