Libertariansm is multidimensional and grayscale. But basically it boils down to the non-aggression principle(NAP). It states that it’s bad to initiate violence. Sometimes an uncessesary bad, but still bad. Then libertarians disagree on when this bad can be permissible.
There are some who are Anarcho-capitalists who take it all the way, for learning about what these people believe I recommend this book:
(first 20min can easily be skipped if you don’t care about which arguments are valid and not)
It is also a good primer for the main NAP arguments and contra arguments. Basically 0% tax.
Then there are the Minarchists who accept a minimal viable government, for example for Military, Police and legal system. Where the police will protect people from initiation of violence but not for victim-less crimes such as personal use of recreational drugs. Like 1-4% takes.
Then there are the sliding scale of libertarianism from classical libertarianism to modern libertarianism with an increasing amount of government services. Roads, firefighters, schools, hospitals etc. Taxes 4-20%.
Then from there there are the social-libertarian to moderates to social democrates where governments gets an increasing amount of wealth transfer, social benefits, culture etc. Taxes 20-50%
From there we have countries who start to restrict the freedom of movement, limiting private ownership etc, tax 50-”100%”.
So this is a sliding scale. Most people in the west take freedom of movement for granted, while people in North Korea and China lack this. Most peope in the west think government should take care of military, police, legal system, firefighting etc. Most of these also think the state should take care of hospitals, education etc, but some think that schools and hospitals are better run privately. Very few think that no state is needed at all, but these exists, see the video above. Some people think that government should provide news, museums, art etc, some people think they should not, this varies a lot between countries.
Bitcoin grew from the crypto-anarchists-movement, but had a lot of initial support from the classical liberterians(often goldbugs, but many gold bugs were very against Bitcoin, many still are(Schiff etc)). Bitcoin is very attractive for anarchists and can be a threat to some states, specially those very reliant on printing fiat currency as a source of revenue for the government. Most people tend to not want to surrender their wealth to the state and given the option might choose to store/use their purchasing power in a less inflationary currency, which could lead to a huge shortfall in revenue for the state. It is also attractive for people who want to do some things that the government forbids, for example buy drugs, weapons, porn, bibles, Mein Kampf etc. This could potentially destabilize some societies.
Imo Bitcoin is agnostic to most ideologies. It can be used by communists and anarchists alike. But it will give individuals freedoms that are very hard to take away, which some less libertarian systems might be against. Unfortuneatly the cat is out of the box now, there is no taking it away. Only way to censor Bitcoin is to censor the internet, which maybe North Korea and China can pull off, but I don’t think many countries in the west have enough political power to pull off.