IMO I think it will die not because of the users, but probably if the miners forfeit mining.
You realize that mining difficulty will adjust downwards if many miners stopped mining, resulting in the remaining miners starting to profit again.
Even when there are no more block rewards there will always be mining as long as users keep making transactions with non-zero transaction fees.
yeah that's why i wonder about bitcoin rising.
If the mining diff will go down,and more and more people will know about btc so they would need to buy more but the amount of them will not rise so fast.
Rise till the end of world?