What was your worst experience from the late 2017, early 2018 ride ?

Mine for sure Einsteinium. They had like this Twitter teaser on a "Mind blowing announcement". People were guessing things like an Apple partnership because there was a Macbook like laptop in the teaser pic. The devs responded by claiming it would be even bigger for the coin than an Apple partnership. Anticipation rose, coin pumped and then the announcement came : "We have a new PoW algorithm !1!!" Crash was hard :-) Straightout criminal deceit.

2nd was Verge's new year eve 'Wraith Protocol' (whoooo) release, not making the deadline and expectations

3rd the BCH flippening, the rocket launched like a mofo but came down just as hard :-)