One of the world's largest cryptocurrency trading platforms, Kraken is poised to go public in the next 12 to 18 months, its CEO told Bloomberg TV in an interview.Jesse Powell, who founded the exchange in 2011, is "doing all the prep work" for going public, but wouldn't provide a valuation target."We're on a mission to bring crypto to the world, and our valuation hopefully will be a reflection of our success in achieving that mission," he told Bloomberg TV.The company held recent talks to raise funding that could value it at more than $10B, perhaps exceeding $20B, Bloomberg reported, citing people familiar with the matter.With more than 6M clients in almost 190 countries, Kraken stands as the fourth-largest cryptocurrency exchange by trading volume, according to coinmarketcap.com data.Earlier this month, Kraken launched its crypto exchange app in the U.S., putting it in direct competition with Coinbase Global, which went public through