The people who use bitcoin think in Satoshi now. There are many wallets and exchanges that allow you to denominated in sotishis. mBTC is another common denomination that people use and think in.

It is true that bitcoin is starting out volatile, but it is still so early when you consider how long major currencies usually last. Things should settle down more and more as it becomes a larger and larger percentage of the economy. I bet gold probably started out pretty volatile, considering some people knew to value it and others didn’t.

Believe it or not, it can be and is used as both. If you have any other questions or things you think won’t work, just ask! A lot has happened in the last 5 years, and most issues people have with Bitcoin have been long ago solved. It is incredible how much different things are now, lots of old issues(like dealing with 0.0000015 issues) are no longer a problem.

There isn’t a government run currency on the planet that has come anywhere remotely close to performing as good as bitcoin in the last decade. Give me something that goes up in value over something that only “slowly” falls in value like the EU or USD.