Используйте «hard currency» в предложении

1. In the ancient Roman Empire, hard currency flowed out of the realm to purchase luxuries from the East and to pay the troops on the frontiers

2. This Kuznetskoff fellow is as interested in buying hard currency as any black marketeer

3. As it was, Vietnamese shopkeepers, bar girls, black marketeers, and pimps, who preferred hard currency, would accept funny money from G

4. I see our current system heading towards the complete elimination of hard currency

5. Those children disappearing are hard currency more valuable than money

6. ‘Aristophanes, right? Never cared for him, but I don’t care about personal taste when hard currency’s involved