How and why would the end of bitcoin (and any other cryptocurrency) occur? Value decrease? Legality issues? Different technology/ideas to supersede it?
The only thing that will kill cryptocurrency is lost of interest of the people who are keep on believing in bitcoins. There are a lot of consumers who already invested tons of money in this industry so it was very far from dying and do not think about bad things on bitcoins because it will surely have a bright future and every one will earn a lot of profit.