My opinion  actually that the reason why bitcoins is the safest system
Because bitcoin technology  and cryptography have a strong record of security records, and the Bitcoin network is probably the largest distributed big project in the world. Bitcoin's most common disadvantage lies in its user error. Bitcoin wallet data that holds private keys can be erased accidentally, lost, or stolen. This is similar to physical cash stored in digital form. Fortunately, users can apply security measures to protect their money or use the services of providers that offer high level security and insurance against theft or loss.