Which altcoins from the last few years where there was a lot of positive talk about it has failed? And by failed, it means either it has went to 0 or it could be worth very little. Like it could been 50 dollars at one point and now 0.50.
EOS? $22 ATH but now, $2. That's a 90% drop that they were not able to recover. It was a buzz when it came out in 2017 during the ICO craze. Even dubbed as the "Ethereum Killer". Now, there isn't much hype around this coin anymore, not even a few mentions of the coin's growth, and their Twitter account seems dormant since last year
2021; so I guess it is safe to say this coin failed to kill Ethereum.