How long should it last?

[sampalokmix]

all google is interested in is money, as long as they are getting paid, they will run them. Unless they are flooded with complaints.

True and we can say that bitcoin will last based on its users , if the number of users are raising day by day undoubtedly saying that it will last more, since the more user to come the higher the profit we can get and it is a domino effect in which existence of bitcoin will highly depend on the users which is the primary reason why it is functional.