It's only been three years since ChatGPT leaped onto the world stage, but artificial intelligence is now becoming an integral part of daily life. The technology has been integrated into search engines, social media apps and online shopping sites, but also shaken financial markets. Here's a look back at how AI moved the world in 2025.  But first, as Bulgaria remains divided on the eve of joining the euro, we take a look at possible implications of switching to the single currency.