There are already cryptocurrencies based on celebrities and memes. Up next is one linked to adorkable bears, bunnies and duckies.  A popular Japanese messaging app called Line is taking the cryptocurrency bait. line-friends Line said Friday that it will launch a cryptocurrency in September. The company will dole out virtual coins, dubbed Link, as rewards for using Line services or the apps that live on the messaging app. In turn, the user can use Link to pay for goods and services offered by apps on the platform.