Not if you have gold. Get the point?
There's a reason gold has been a store of value for something like 2000 years. It doesn't "go away" on a fluke.
I can see where this convo is going. Someone will now retort about how you "can't take gold with you" or some shit.
Close-minded people who do not remember history cannot see the problems that can occur by putting all their eggs into a very frail basket that bases it's existence on something that exists through only man-made means, and can only be sustained through man-made means. Meanwhile, gold is still flailing it's arms going, "Oooh ohhh, ME! I'm still here!".
To answer your question..."How likely is all the world's power going out all at once?"
Not likely, sure. But it is a possibility. We're in the shadow (pun?) of a giant and violent fusion reactor that occasionally has a hissy fit and spews out X-class flares that messes up earth. It has caused major blackouts in the USA you know. So when the blackout happens, and your money is stored on something that requires electricity BUT YOU NEED THE MONEY RIGHT NOW, how can you access it when you have no power?
Trump was very unlikely to become president, but shit happens.
And before someone else pipes up about batteries, just shut the pie hole. Because the batteries have already been depleted charging your electric car, running your fridge, and keeping the PC, iPhone, router, air conditioner and all the other conveniences running so you can live your comfortable life. There's no more power left to power the servers with your money on them, in their "soft wallets".
Or, in the chaos, you forgot the password to your hard wallet.
Ooops! Gee, gold doesn't need a password. It still just sits there flailing around going, "Oohh ohhh! I'm still here! Lick me!"
You can't lick a bitcoin, man. If you try to, you'll short out your hard wallet, hehe.