"Bitcoin killer" is another way of saying "innovative coin" and innovation doesn't cut it anymore. The biggest gains I saw in 2016 were all coins who networked in some capacity, whether it was legal networking or illegal networking. The technological side of Monero and PotCoin are pretty weak and yet they saw some of the most ROI in 2016.
https://bitcointalk.org/index.php?topic=1732516.0Monero got into the dark net markets. Potcoin got users from the cannabis industry. NEM networked around in Malaysia and Japan and some businesses / banks took them on.
Iamnotback's "Bitcoin killer" is pretty useless and doomed to fail if it's just him trying to push his coin on Bitcointalkers. Other innovative projects, who don't have networking, are also having hard times and I doubt that'll ever reverse.