I created an account on OKEx about 9 months ago.  There were so many issues with instability at the time that I didn't bother trading there.  I may end up trading ZEN at Cryptopia Exchange.  Especially, if they do not request for personal information.

I'm planning on taking the majority of my coins OFF EXCHANGE(s) some time during the month of August.  I plan on holding onto them REGARDLESS of what occurs with the price action on exchanges.  The reason I say this, is my concern for the current global financial and economic system.  I'm expecting a recession at a bare minimum to begin some time in September or October; just before the mid term elections in the U.S.  We may ultimately fall into a depression.  Or even worse, a total collapse of the FIAT (Financial) system.  If that occurs, it's probably not a bad idea to have your coins off exchange just before this.  Especially, if the banks shut down and FIAT fails.  

Many exchanges that allow trade in actual US dollars may have issues if the banks fail because many may have FIAT in a bank they were holding for those who transferred FIAT to the exchange.  If the bank the exchange uses to hold FIAT that's transferred to the exchange actually failed, everyone who transferred FIAT to that exchange [but have not bought crypto with it yet] MAY LOSE THEIR OPPORTUNITY TO BUY CRYPTO with that FIAT they transferred to the exchange if that bank closed due to insolvency.  The exchange will basically end up sending everyone an email informing them about the bank they did business with shutting down and not having access to the FIAT everyone had transferred to the exchange.  That would be a MAJOR ordeal.  It has me concerned to say the least.

So, this is my warning to fellow ZENNITES to protect themselves for the potential of this occurring.  Just don't leave much crypto on the exchanges during the month of September and October.  We might be in for a rough ride.