Gemini to Roll Out Bitcoin and Ether Block Trading Cryptocurrency exchange Gemini said Monday that it will roll out block trading for bitcoin and ether starting later this week. The feature – which will allow customers to make high-volume trades that won't appear in the exchange's order book until they've been filled – will go live at 9:30 a.m. ET on Thursday, Gemini explained in a blog post. There's a minimum threshold of 10 bitcoin or 100 ether for the…