i found this funny. bitcoin's first HN post, and commentor claiming its cute, but no will entertain the idea.
Both systems can obviously co-exist. Much like how gold co-exists with fiat money. Or how there's bittorrent and S3.
And it is true the adoption part is still tiny (just equivalent to one of the top S&P500 companies in market cap) compared to its potential. And the numbers show that as adoption increases, volatility goes down.
Maybe put those forward, and someone will address them for you.
You can quibble about which parts of the world are "real" or not, but the adoption of Bitcoin ($1.3T) dwarfs 99% of company market caps.