Thankfully I didn't mainly trade on Cryptopia as I only discovered it while trying to sell an altcoin worth a few dollars at best.
But still, a wake up call for the rest to keep as much of their funds off exchanges as possible.
True, I always put my stuff in my own wallets. But if you unlucky, while doing a trade ....
I encountered it before; suffered a stolen (in-joke) on Bitgrail with a bunch of my NANO withdrawn. I was left with no choice prior to the incident although the exchange was shady due to the limited exchanges NANO had back then.
Until now, the lawsuit is still ongoing.