* Deflationary by design

* Early adopters disproportionately end up in control of majority of coins (currently 0.03% of wallets own 59% of all bitcoins)

* Proof-of-work is wasteful

* Chain is very inefficient

* Loss of coins with loss of wallet means, for one, that inheriting the coins is not possible unless special precautions are taken which undo a lot of the security

* Other libertarian nonsense that shows very naive understanding of economics that I can't think of at the moment