Bitcoin has been confirmed as the best safe haven currency in the world with the following reasons.
1) If they is a military war, someone can easily move out of their respective country with Bitcoin. Cash, gold, silver is much harder to deal on.
2) The only one Currency not controlled by a government or bank.
3) I will have to ask a general question? Why many governments are classing Bitcoin as a property & not a Currency.
My advice is keep buying Bitcoin and don't look back. Also don't forget LTC.
Considering point 2:
Basically if you use any kind of crypto currency there is no sort of government or bank specific control because everything is kinda private.
Only the exchanges you use will always be the ones providing such informations to your banks and government.
There is no specific currency as you mentioned.
Considering point 3:
Probabily due to Bitcoin being the main currency and most used one for both new forks, new coins creation incentivates, new hardwares and even new technologies.
Most of the new payment methods are using Bitcoin as main currency <-> fiat therefore it becomes easier to call it as a property rather than a currency for people's understandings.