This is some nasty scam outthere.They just create a crypto exchange and list a totally fake bitcoin price(it can be even 50K USD) and wait for the naive people to deposit btc in their platforms in order to sell their btc and get the profit.Guess what,there`s no profit and the people have been scammed.
WEX.nz is a pretty strange name for a crypto trading website.I would never trust a website with such name.