Its secret is because it is based on blockchain technology which means it is also decentralized.  It has a defined maximum supply so that almost every bitcoin user knows it and so manipulation would mean fraud.


I'm tempted to hastily conclude that when bitcoin stops (if that is possible to come) , that the early adopters would benefit but that won't be exactly correct. The people that would benefit are those who don't have any bitcoin in their wallet, those who refuse to hodl for a long time. And the disadvantaged are those who still has it in their wallet