It would be hell to have competing companies all lay down their own pipes to give you water.
No, it wouldn't. What's hell is when the government sticks a gun in your ribs and forces you to empty your pockets or give up your land against your will.
How would it not be?
Lets say the water pipe is 1 foot wide (its smaller but i'm just trying to give an example) and that's laid down first and serves you and your neighbor. Then company B wants to send you their "mountain springs" water but your neighbor wants to keep company A. So the road is dug up and a second pipe is laid down alongside that pipe.... then company C wants to sell your other neighbor some water.....
Seriously? A company lays down pipe and what 1%, 5%, 20% are unsatisfied for some reason and a different piped water company is what they want? And they are going to pay way more for what difference exactly? They would be a much smaller group paying all the same fixed costs.
More likely they will get water delivered to their tank in a truck, or buy a rainwater system, etc.
Pretending people are going to do insanely unprofitable things if they get free is silly. Sure people will make mistakes, but they will tend to have less capital to mis-allocate in the future.
Sorry if my appeal to ridicule was completely lost on you. But that was exactly my point, it would be insane to rebuild the infrastructure every time.
And there's no such a thing as natural monopoly.
There's no reason for water supply, for example, to be provided only by a monopoly.
It isn't. You can, if you choose, have your city water turned off and just use bottled water for all your needs. I actually do have a friend that did exactly that. He gets a truck delivering dozens of heavy bottles to his house every week. (Dude even has a swimming pool filled with bottled water.... oh well, his money)
But the vast majority of people i know continue to use city water directly, an occasional few also purify it for drinking but the same source is there.
Seems like a natural monopoly to me, all the citizens can freely use other sources of water, most just choose not to.
But on a different note, I do agree that competition is good with bitcoin, people will choose what works best for them.... But would one system eventually emerge as a natural monopoly?