Well that is the goal and purpose of cryptocurrencies in general.

But, do you really think bitcoin is ready for that? We already know it's limits and weaknesses. The moment the network clogs, transaction fees skyrocket and speed gets really slow. Add that to a very volatile nature, it's no surprise that users and markets find it hard to use it as a payment system. We know these numbers, and guess what, that's nowhere near the numbers we'll reach if people use it, say, in amazon or even smaller online markets.

The development is just extremely slow. I do like to see cryptocurrencies do what it's meant to do, but I guess we'll still have to wait a couple more years for that.