Isn't it ironic that the libertarian bitcoiners, champions of laissez-faire capitalism, are betting all their life savings on the hope that the Satoshi Bitcoin will be one day the only cryptocurrency in the market, so that they can charge monopoly prices for it?

I see no irony there. I am not sure you understand the core values of libertairianism in light of this comment. Libertarians tend to defend what others call monopolies.
Perhaps I don't.
A monopoly is the opposite of free market by definition, so how can one be in favor of the latter without being against the former?
If libertarians do not object to monopolies, why do they object to government, which has by defintion the monopoly in many fields (army, criminal punishment, money issuance, etc.)?