1) No relationship to anything in the real world either physically or economically.
3) You can trade it over computers and never have to integrate into society or meet people.
4) Can be traded at super high frequency by computer programmes.
All these things are true for all hard currencies. Well, for 1) I don't know think I know what you mean by that.3) You can trade it over computers and never have to integrate into society or meet people.
4) Can be traded at super high frequency by computer programmes.
But 3) and 4) also happens to other currencies. See High Frequency Trading. Some governments think about stopping this, but they can't really do so. The only way to stop it would be some kind of fee (tax), which makes it impossible to do so. Well, Bitcoin has transaction fees. This probably makes it more resistant against something like these things. Just another nice benefit of Bitcoin.
Yes I know some points are similar to conventional currencies. You need to fulfil them all to make a quant geek currency such as Bitcoin.