How and why would the end of bitcoin (and any other cryptocurrency) occur? Value decrease? Legality issues? Different technology/ideas to supersede it?
If people stop using bitcoin, bitcoin will be dead. We see it in many altcoins. Some new altcoins are rising in price when demanded. Later, when people stop using it they dead.
Apart from this, the bitcoin system will always be.
I agree. when there are no more people using bitcoin, bitcoin might disappear. I think so many examples that already exist, so much altcoin that have disappeared due to disuse, and it will happen in bitcoin if nothing else is using it.