I would argue that antimatter still has the same mass as regular matter, so you have to pay regular import duties. On the other hand, if tachyons exist, they would have imaginary mass, for which the import duties would have to paid in imaginary money!
a big man came to me, tears in his eyes, great guy...Sir, he said sir, why do we let Europe screw us on anti-matter? they just make this stuff negative like it doesn't exists and they want us to pay us, when we invented the anti-matter...so unfair
Just like matter and antimatter, money and anti-money (debt) are created and destroyed together, and cancel each other out. When they come in contact, both are deleted.
All money creation, pretty much, is accompanied with creating a corresponding debt.
Bankruptcy sometimes deletes anti-money but the 'money' stays. I'm not sure what role interest payments have (I think that's a case of transferring money around). The bankruptcy thing seems a bit like baryon asymmetry.
However, there debt that keeps in taking. Such ist the case when in debt with a criminal Organisation. In which case current models are still lacking good explanations.
Aka a perpetual bond. But not always voluntary. A lot of things are like that though, it's a bit like paying a fine or a tax. Just the decision-making process is different.
