Bitcoin as it is presently constituted is untenable. From its way too high fees, lack of scalability and its huge energy consumption. Having said this, maybe we shouldn't throw the bay out with the bathwater. Lightning network is coming to bitcoin and this could make a huge difference. According to a very in depth article in bitcoin magazine there is also:
increased privacy through Tumblebit and Zerolink, more sidechains, more adoption and to cap it off a Schnorr Signatures Proposal. Any techies out there understand these new developments coming down the line? Do they have the potential to rejuvenate/rescue bitcoin?
https://bitcoinmagazine.com/articles/keep-eye-out-these-bitcoins-tech-trends-2018/