"China has been a major destination for Australia's recycled waste, with around 1.3 million tonnes exported in 2016–17. This accounted for 4 per cent of Australia's total recyclable waste, but included significant amounts of recyclable plastics and recyclable paper (35 per cent and 30 per cent of Australia's totals)."
It may not be easily seizable, and with the right security practices it may be nearly impossible to seize directly.
But governments could announce certain coins are not spendable and enforce that on companies or people subject to their jurisdiction. Prosecuting anyone who accepted one of those coins with a crime.
Those types of tyrannical governments already have people operating in black markets. Crypto doesn't really change that it just makes the bad government's job harder which the vast majority of the world would agree is a good thing. The people of Sudan, Syria, Turkey, and the Phillipines among others are grateful that cryptocurrencies give them an option of having freedom.
A lot of the themes and messages in Avatar are very common in science fiction, in particular the parallels with the story of Dune are striking:
- greedy corporation seeks to exploit a resource with little regard for the native population (spice/unobtainium)
- saviour from same race as greedy corporation is accepted into native population and through a mythical prophecy, becomes leader and unites tribes against greedy corporation
- native population and their natural habitat are massively underestimated and through help of saviour defeat greedy corporation
https://www.aph.gov.au/Parliamentary_Business/Committees/Sen...