In Puerto Rico, tax breaks enacted in 2012 were meant to encourage mainland U.S. residents to do business and live on the island, boosting the economy by exempting them from capital gains taxes. But recent data suggests that the tech (mostly cryptocurrency) entrepreneurs who arrived in droves to save their fortunes didn't do much to improve the island's fortunes. If anything, some left behind a mountain of unfinished business, reports a new New York Times article. The article focuses on Brock Pierce, the 43-year-old former child actor who created the now-struggling digital currency Tether and whose local business deals (including a real estate spree) were unlucky and short-lived.