Yes, it is already becoming something like that. Mainly a store of value/digital asset which keeps growing in price. As a payment system it is becoming good only for large transactions, but definitely not for micro-payments. If you wanna buy expensive stuff, you'll be quite glad to use Bitcoin, because fees, confirmation time and other things seem quite better than banks or other online payments like paypal, but if you wanna buy small items, worth for example 10$ or less it is not a good idea to use Bitcoin because it's slower and more expensive than paypal, credit cards, etc.