alt Hacker NewsSatoshi is a paper billionaire - he can't use a small fraction of his "wealth" to hire proper security. Simultaneously his "assets" are much more attractive to criminals. Imagine holding a regular billionaire hostage and demanding they give you a billion dollars. They'd probably have to sell 1B worth of stock, then convert it to cash (or crypto), etc. all of that requiring multiple interactions with different people and institutions.
Heisting multiple billions worth of crypto would have the same issues, just to a smaller degree. If that much illicit money is on the line, `mJurisdiction` which normally looks the other way might be tempted to investigate and confiscate it for their own benefit.
They also can't easily sell that amount quickly without repercussions (and without another institution like an exchange).
You're right, but only to a limited degree.