By Barry Randall In early March, PureFunds, the ETF sponsor that in late 2014 brought you the "Cyber Security" exchange-traded fund (ETF) (HACK) released another on-trend financial product. This time, PureFunds is hoping you'll 'play' the video game space with its "Video Game Tech" ETF (GAMR) . I've been covering the video game industry for about 20 years, first as a buy-side analyst and then as a portfolio manager focusing on technology stocks. My first reaction to learning about the GAMR ETF is…what took you so long? The cynic in me figured that this product was long overdue. But that doesn't mean buying it is a good idea.