In a good news for online shopping soon they can use Bitcoins –digital money, as their mode of transaction.

You can now pay your mobile or DTH bill through the digital currency, Bitcoin. Online shopping and utility bill payments via the virtual currency should be available soon, as a news agency has said.
Bitcoins are digital money and their value is determined on the basis of their demand and supply. The digtal money is limited in numbers.
Only 21 million Bitcoins can be generated globally and they can be traded even in fractions, up to eight decimals. Last bitcoin will be generated in 2140 but 99 percent would be already there by 2040.