This year’s BlockShow saw some 3,000 attendees flock to Berlin to hear the latest and greatest about the wide world of cryptocurrency and blockchain technology, and we were pleased to see the event host a designated “Spend Your Crypto Here” zone. By all external appearances, it was a place where you could exchange your bitcoin, ether, or other cryptocurrency for t-shirts and conference knick-knacks. Among a tech-savvy crowd of this size, it made loads of sense to offer such a crypto-enabled storefront. Finally, a place where it was perfectly normal to pay with digital currency! Then we asked the booth attendant which kinds of crypto she would accept in exchange…