While you're at it, compare coins in the same sector to see whether it's an isolated move or a market-wide trend.
For example: Brazilian exchange Mercado Bitcoin was hacked, losing over $46 million. The hacker holds about $9.2 million in altcoins; $PEPE is down 2.03% today, with a trading volume of 47.34 million.
There have also been cases where prices stopped falling after all the bad news was priced in, so don't rush to conclusions.