It’s been a horrific year for cryptocurrencies. But that hasn’t stopped Greg Tusar, the former global head of electronic trading at Goldman Sachs Group Inc., from being excited about the space even as the digital-asset universe continues to melt down. “It feels like being at the early days of trading equities electronically,” said Tusar, who serves as chief technology officer and is a co-founder of Tagomi Holdings. “It’s early stage, there’s a lot of opportunity to build great businesses and have impact.” Tagomi, which bills itself as the first live electronic brokerage offering prime services, has begun executing ... (full story)