Well, kind of true... It's impossible to make something that's unstealable. There are always going to be thiefs. However, Bitcoin continuing to appreciate necessarily means that the mechanisms that have allowed the state to metastisize will break down. A state that can no longer grow unchecked will reduce the number of thieves in the world.
Discussion
This is why I keep saying -- if you hold any significant amount of BTC, the only way you're going to keep it is through jurisdictional arbitrage.
I.e., moving out of most Western "democratic" jurisdictions (other ones like China I discount from start and are not even on the table) to other places that respect your private property or that, at least, you can play off against your original citizenship to create a "vacuum" that allows you to keep your shit.
I just can't see any other way we're going to make it without being robbed, kidnapped or eventually even murdered for having BTC.
The state has no business in knowing how much of what assets we own. It was silly internet money until it wasn't, now they want a piece in perpetuity, even aiming to tax unrealised gains. I think it's going to be a messy transition if it happens.
No such thing as a clean revolution. Messiness will increase until moral improves.