If we do tend to make up a lists about events and things happened since 2015 then it would be something a very long one.I wont really be mentioning it 1 by 1 but for sure those things in OP stated were included.

Talking about on what are the most difficult times? Bear market cycles are common and also into those news in regarding banning, exchange hacks, Extreme fuds in speaking about regulation and other similar stuffs
is really that relevant and common.

Im not really that suffering or whatsoever considering that im still holding my coins no matter what.They would really be sell out depending if i do see some golden bull run once
again which i had missed out on doing so back in the past.