[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"exercise-255":3},{"payload":4,"id":7,"user":8,"level":14,"course":15,"activity":16,"activity_slug":17,"title":6,"topic":18,"tone":19,"stats":20,"created":23,"score":24,"is_favorite":25,"public":26,"is_external":26},{"text":5,"title":6},"Few modern ideas have spread as (0) QUICKLY (QUICK) as cryptocurrency. When the first digital coins appeared, many people were unsure whether they were a serious (1) .......... (INNOVATE) or just a short-lived trend. Yet the story began with a bold (2) .......... (CREATE): a system that could move money online without a bank in the middle.\n\nAt the heart of this invention was a new kind of (3) .......... (SECURE). Instead of trusting one company, users relied on cryptography and a shared record of transactions. This record, known as a blockchain, made it extremely difficult to change the past without (4) .......... (AUTHORISE).\n\nOf course, the early days were full of (5) .......... (DOUBT) people. Critics said the technology was too complex for ordinary people, and some worried about its (6) .......... (LEGAL) status. However, as more developers joined in, the community grew in size and (7) .......... (STRONG).\n\nToday, whether you love it or hate it, cryptocurrency has forced us to rethink what money is. For many, its greatest value is the (8) .......... (POSSIBLE) that anyone, anywhere, can take part in the global economy.","The Birth of Cryptocurrency",255,{"id":9,"username":10,"first_name":11,"last_name":12,"image":13},20253,"james-ford","James","Ford","https://storage.googleapis.com/uoepro_files/prod/useofenglish_ai/users/avatar/20253-b2rl4g.jpg","B2","Reading","Word Formation","word-formation","An exercise talking about the invention of cryptocurrency","Inspirational",{"times_played":21,"num_favorites":22},2,0,"2026-04-10T01:00:26",null,false,true]