As a libertarian I believe in the Tenth Amendment, which grants power to the state.
Sorry, if the state says you cant live in a park YOU CANT LIVE IN THE PARK...
Marxism, the New Left, and now the Bill of Rights -- we're developing a pretty long list of things you think you know about, but of which you clearly know a lot less than you think.
Here's the 10th Amendment full quoted. I've taken the liberty of highlighting the words you seem not to understand are in there.
"The powers
not delegated to the United States by the Constitution, nor prohibited by it to the States, are reserved to the States respectively, or to the people."
Please note the bolded section. The tenth amendment DOES NOT, as you seem to believe, make the states supreme over the federal government or the Constitution. In fact, it does the exact opposite. If a power is delegated to the federal government by the Constitution, or prohibited by it to the States,
then that is not a power which is reserved to the States.
Thus, the States cannot coin money, because that is a power delegated to the federal government and explicitly forbidden to the states. The states cannot make treaties, or maintain armies or navies, or go to war independently. And with the 14th Amendment and the incorporation by it of the Bill of Rights to bind state governments, neither can states pass laws which violate the Bill of Rights.