So one of the points that Palast asserted (is it true?) is that the US and UK are holding a digital currency siege on Venezuela's own money.
Not sure about this.
What does that even mean?
Venezuela can print all of its own money that it wants*. And it has been printing a lot. That's why it has 1,000,000% inflation.
*Well, except for the fact that it has destroyed it's ability to produce things so it pays people in other countries to print its money.