what are the difference between e-commerce and e-currency?

ecommerce are business transactions (the sale of goods or services) that are conducted electronically; namely, over the Internet.

ecurrency is money that is transferred electronically; namely, over the internet.

Ecommerce is the sales and purchases of goods and services over electronic systems such as the Internet. And The e-Currency is the shorter form for electronic currency and is a means of exchange with which you can make and receive payments online.