Some of the biggest names of Estonia's tech scene are backing Lightyear, a startup looking to become Europe's answer to commission-free trading pioneer Robinhood. Lightyear currently operates in 25 countries. However, with help from angel investors like Bolt's Villig, the firm will be able to launch in another five markets "pretty quickly," Sokk said. Villig told CNBC that it can be "challenging to scale a business across multiple countries in a heavily regulated sector," adding that Europe's less developed ...