Gold and bitcoins aren't the same thing.
As far as I can tell, we don't really use bitcoins as a medium of exchange either. You would convert them into a currency if you wanted to use their value store. And yeah, other than the fact that gold can be tranched, I'd say that the analogy with regards to mining is a reasonable one.
My main objection against Bitcoin is that the exchanges aren't insured and that you can't easily buy everyday items with them. Despite Zelig saying I can buy groceries and pizza from some obscure place in the Netherlands, I can't buy anything around where I live with Bitcoins and trading Bitcoins for cash is limited on the amount you can trade.
So don't get bitcoins if they're not useful to you - just like any other currency.
BitCoin is not useful like there anywhere.
So just like any other currency in all but <1% of countries each?
As I said, each country has its home where its useful, that place is where people spend most of their lives. Bitcoin has that kind of usefulness absolutely nowhere. You can buy everyday needs with Bitcoin anywhere in the world. Its not accepted countrywide anywhere on earth.
Swaziland currency has no usefulness anywhere outside of Swaziland.
It has some usefulness everywhere. Swaziland currency has no usefulness anywhere outside of Swaziland.
That's not true. There are currency collectors and people who want to trade for Swaziland currency outside of Swaziland.
It has very little usefulness anywhere. Swaziland currency has usefulness in Swaziland, there is no Bitcoinland. If you have Swaziland currency, your probably from Swaziland. It doesn't matter which country your from or spend most of your time in, because Bitcoin is going to be fairly useless in that country to buy everyday things, no matter where you are.
They can be approximated as not existing.
Bitcoins can be approximated as not existing. For example, if people stopped trading in Bitcoins, one pizza shop in the Netherlands would go out of business. If people stopped trading in Swazi currency, that's a whole country with no means to exchange debt.
Which isn't relevant at all to bitcoins being more useful than Lilangenis.