What you said is essentially meaningless though. "I don't like a blockchain-based currency because the record of transactions is permanent." Well...yeah, that's the whole point of blockchains. The strength in Monero's case is that everything is so obfuscated (and amounts + addresses are encrypted) that it's the best option out there. It doesn't have to be perfect, it just has to be better than its competitors.

e.g. Facebook isn't perfect, but it sure obliterated MySpace.