- Democratic = run your own node and participate in the Bitcoin network
Bitcoin isn't democratic. Running a node isn't voting. It might be considered as "taking place" into something, but change doesn't come according to the number of nodes that demand it. Proof-of-Work is a voting system, but it doesn't bring change. It is only to sustain the current system, with current rules; not to change them. A 51% attack isn't changing what's valid.
Some Libertarian theories explicitly try to remove any rules but when there are no rules (vacuum), this vacuum will be filled by those who have or will quickly accumulate power (money).
And in which place there are no such rules? As far as I'm concerned, very few countries live on free enterprise, with minimum government intervention. In most countries, government steps in regularly.
Its not a secret that when there are no rules, chaos will arise.
What you describe is anarchy. Not libertarianism. The former is described by lack of moderation. The latter is described by lack of government intervention in most (if not all) market activities.