There is one idea in crypto-currency that is unquestionably good, but most parts of the bitcoin protocol are "good" only if one subscribes to the libertarian dogma that banks and governments are evils to be removed.
The only thing about bitcoin that matters is that it is an accurate ledger of transactions, that it is open to the public, and that it cannot be fucked with.
(apologies to JJG, this post has been heavily edited
)