No idea what your definition of totalitarian state is, but there certainly was not a complete ban on firearms neither in Nazi Germany nor in many of post WW2 socialist countries (e.g. hunters).
It actually started post-WWI (due to Treaty of Versailles).
> In 1919 the German government passed the Regulations on Weapons Ownership...anyone found in possession of a firearm or ammunition was subject to five years' imprisonment and a fine of 100,000 marks. [1]
Laws were later relaxed from a total ban, though ownership was low, as all guns and ammo had been confiscated earlier. And Jews and companies with at least some Jewish ownership were forbidden to own any firearms or participate in their manufacture.
When oppressing a group, either selectively or indiscriminately, guns + speech for that group must go.
[1] https://en.wikipedia.org/wiki/Gun_legislation_in_Germany#Reg...
Waco and Ruby Ridge had an endless arsenal of small arms. It didn't help them.
But history shows otherwise: Vietnam, Afghanistan, Iraq.
Empirically, every totalitarian state bans citizen firearms (Nazi Germany, USSR, Cuba, N. Korea). For "good" reason.
While of course different, crypto has many of the same pros and cons as firearms, and it should be supported for the same reasons.
https://xkcd.com/504/