Hello Vandar,
Firstly, I thank you and all Bitcoin Z's team members for all your good works to do the upgrade that help to secure the Bitcoin Z network better.
Secondly, I would prefer to ask for current safest exchanges to trade Bitcoin Z. I tend to choose STEX, but I really want to hear official confirmation from BTCZ team that STEX supports the upgrade. Which ones do you suggest?
There are some exchanges, but I don't know that which ones support the upgrade. Recent weeks, volume of Bitcoin Z has been so slow, maybe due to early effects of the upgrade.