I'm not sure that's accurate. Nothing is effortless. Collecting gold was probably not such a walk in the park.
Actually it was. They didn't go door to door and search houses for gold.
They said, "Go turn in all your gold for paper money by this day, or you're breaking the law." And people did it. There's no reason people couldn't have buried their gold in the back yard and traded it on the black market if they wanted to. But just about everyone decided holding gold wasn't worth the risk.
Technically Max is wrong. The government could declare that private ownership of bitcoins are illegal. They could even offer to buy them from you and give you amnesty up to a given date so you're not deprived of property.
But effectively it's much more difficult to bitcoins than gold. There was an article floating around a few weeks ago about someone who got busted smuggling a million dollars in gold across a border. It would be trivial smuggle a million dollars in bitcoins out of the country. You could just encrypt your wallet, email it to yourself, and then there's nothing for customs to seize as you flee the country to start life over in Sealand.
The spirit of what he said is accurate even if it's not 100% academically rigorous.