It could be a really good use case for a crypto currency. But eg. Bitcoin needs too long for a finished transaction (I don't want to wait ~10 minuntes until I can read an article). And you still can track down a person who purchased (separately) two articles by his keys or analysing the block chain.

I know we've a lot of crypto currencies right now, but I really hope that there is finally a new one coming, which is just simply fast, secure and somehow helps you paying anonymously.

In case of an article (which is cheap) there is no need to wait for confirmation, it's enough to wait for transaction to appear in mempool and have enough fee.