Earlier quoted context omitted.
I don't understand the dilemma. Nobody is forcing you to use bitcoin and it's still an incredibly small market in the grand scheme of things. The libertarian position is (generally) that government mandated fiat currency is a tool of state oppression. No such force exists when it comes to bitcoin, and if people are unhappy with the concentration of bitcoin in the hands of a small number of people, they are free to us…
What's the difference between a government manipulating a currency and a cabal of wealthy individuals manipulating a currency? Or is your problem mainly that businesses have to accept dollars?
Some libertarians may be more pragmatic than others. For example, some may argue that so long as a government issued fiat currency is in use (as it is today), manipulations by the government should be held to a minimum. This may be the cause of the confusion.