Which of the following statements concerning money is correct?

1. The value of money is not based on the confidence that the government and monetary authorities will be able to control the supply to achieve stability and that the purchasing power does not fall
2. Paper money was developed since specialization between countries led to increases in trade, causing the use of coin to be inconvenient as this was difficult to handle and not safe to transport
3. Credit cards are money because the function as a medium of exchange
4. Electronic money is another form of money as it can be used as a means of payment