Exactly! It is very normal to have a correction after +500% run up.
It was a pump and dump. It's too bad you can't see that. Much of this kind of thing is happening on a regular basis with altcoins. You can see it here:
https://coinmarketcap.com/gainers-losers/Unfortunately, the cypto market is highly manipulated and controlled by whales and Wallstreet thugs. Hopefully, this will change in the near future.