Never? It's faaaar too early to make that claim. What if the cryptography is broken? Or if another crypto-currency comes along that's demonstrably better, to the point that everyone stops buying bitcoin and starts buying this new currency instead? These are but two scenarios that would cause bitcoin to lose its desirability, and therefore its value.
> Never? It's faaaar too early to make that claim.
It will never be more certain than it is right now. What are you waiting for?
> What if the cryptography is broken?
Sorry, but I trust ECDSA and SHA256. Quantum computers may be a concern eventually, but I think there are mitigation strategies for that.
> Or if another crypto-currency comes along that's demonstrably better, to the point that everyone stops buying bitcoin and starts buying this new currency instead?
What if a unicorn flies out of the sky and starts pooping rainbows? There is no possible crypto-currency that is demonstrably significantly better.
So, basically, gold has ceased to be priced at all based on intrinsic value, and entirely based on the projected fact that people will continue to want to use it as a store of wealth in the future, so therefore, you will be able to trade your gold for something else valuable. (Which is exactly the projected fact that is keeping Bitcoin going.)
Arguably, Bitcoin's property of being easily transferred and stored greatly outweighs the property of gold that there are real-world uses.
But if everyone in the world decided tomorrow to stop investing in bitcoin
If.
At this point, it's pretty clear (to me) that that will never happen, short of global government intervention. If there is a major dip in Bitcoin price, investors will buy it back up. Bitcoin has established itself as a useful way to store and transfer value for investors. For everyday transactions, I think it's in the process of proving itself.