Only traders and speculators heavily involved in the cryptocurrency markets would have noticed the early warning that ZRX was about to be listed ...
source https://www.google.com/url?rct=j&sa=t&url=https://www.exchangerates.org.uk/news/23207/cryptocurrency-news-0x-zrx-listing-on-coinbase.html&ct=ga&cd=CAIyGmM2Nzk3ODA2ZWViNjVjODI6Y29tOmVuOlVT&usg=AFQjCNFR3s6x5up7yHwL2CZaKJ4RShwj3g
