Crypto is by definition a small market without circuit breakers. If price goes down, there are no limits and price swings exceeding 50% aren't an exception, especially in relation to small coins or coins that have experienced a major rise before a big dump.
I expect volatility to become less the bigger a market becomes and the more spread out the tokens become. In that respect, we still have a long way to go.
Yeah, there is definitely no doubt that we will see this kind of thing again.