I always keep my funds fully secured because i can't keep my funds in any exchanges like fork delta, etherdelta.com and other decentralized exchange. But some centralized exchanges binance, kucoin, and houbi also can you keep in those.
I also believe that to keep your funds secured, you have to spread out your portfolio projects that you researched and make sure to always have a cold wallet somewhere.
My advice is that you should not keep all the assets you have on the exchange, do you not see that the exchange place for cryptopia is having a hacker attack and causing them to lose their assets? so my advice is not to keep assets in exchange because the risk is too high.