Look at the Bitcoin whitepaper once more: a peer-to-peer electronic payment system indeed. Was Satoshi really envisioning a payment system so widespread that it became a preferred way of paying for goods and services? What's happening today? Bitcoin is now more of an investment than a payment tool.
Samsung started as a grocery trading store but it's among the world leading providers of mobile phone in the world. Where we're today mightn't have been where satoshi envisioned but it has given Bitcoin the publicity it needed and that's an achievement that could have taken us centuries to achieve but we have done that in just a decade. As Bitcoin keep improving we'll achieved it been widely use as a currency more as satoshi wanted but this is a process and we have to believe in the process.
Bitcoin is still a currency but it's features are making it more appealing as a store of value (investment opportunity), that doesn't mean Bitcoin has stopped been a currency. As more countries adopt Bitcoin and more companies recognised it as a payment option, the use of Bitcoin as a currency will increase. You don't expect people to use Bitcoin as much as you have loved when there aren't enough institution to facilitate that.
Bitcoin hasn't deviated but its assets quality is what is been focused on and things would be different in the future when more adoption comes onto the industry and businesses that using Bitcoin more frequently. For the meantime what I think is important is for Bitcoin to not die. It still been relevent is a positive thing and gives room for more development and improvements.