Also, Bitcoin has an advantage over gold in terms of security. Guarding a lot of gold in a vault is expensive, but keeping a Brainwallet is not.

Bitcoin security is much cheaper to implement, but the drawback is that it's a lot more susceptible to fraud and large-scale theft. Such thefts have occurred in the last few years.

Which brings up another hilarious Bitcoin Pascal's Mugging scenario: "What is the probability that you die, are cryopreserved, and are resurrected at some point in the future. But this future world is a dystopia, and cryoresurrected people are indentured servants of the company that revived them until they are able to pay back their debt. Since most jobs have been automated it is extremely difficult for you to get the money to ever earn your freedom. However, if you had created a Bitcoin brain wallet, you would be able to access it (because the cryoresurrection process is very good), and you would have something of value with which to pay off your debt and live comfortably in the new world".

This assumes the future world still values Bitcoin. I'm reminded of a Twilight Zone episode (The Rip Van Winkle Caper) where a group of thieves steal a large amount of gold, then use a form of suspended animation to sleep for 100 years, intending to wake up in a future where no one remembers their crime and they can live in wealth.