You have a billion aussie dollars in the bank (only 250k is guaranteed) , it's worth a billion aussie dollars and you'll have a billion aussie dollars, theres no guarantee you'll buy the same amount of goods and services with that billion aussie dollars tomorrow morning.
You have a billion worth of bitcoin, lets say 10000 bitcoins for example sake, tomorrow morning you'll still have those 10000 bitcoins no matter what happens even if the government goes broke you'll still have them 10000 bitcoins and governments do go broke they are actually very good at going broke, what you can buy with those 10000 bitcoins tomorrow depends on the market price which is valued in fiat currencies, our barter of exchange.
Same with gold, if you have 10000oz's under the pillow, they'll still be 10000oz's there in the morning.
If the internet dies and never comes back you might have a problem with finding your Bitcoins, however i guess we would have bigger problems to worry about if that happened.
It's, be it Bitcoin is just another form of money or asset thats all, like Gold, platinum, $AU, $US, Diamonds, Silver etc etc.
