Welcome to FN Weekend, your Friday smörgåsbord of the best news, features and opinion from Financial News this week.

What goes up, must come down — right? Well, not if we're talking about bitcoin, it seems. The price of the cryptocurrency is smashing through records on a daily basis. AND it's about to become a bona fide financial instrument, meaning anyone who thinks this is just Tulipmania in the digital age will soon be able to put their money where their mouth is...