You mean when something disturbing happens between two people, maybe one is being dishonest, since it's a private transaction, so no other third parties can help.
But after the setup of Legal tender ( in a sense, it's like using other people's rules), then the third party can step in to sort things out with the law, like in the fiat system 👀
Yes. "Legal" in the term of "legal tender" it doesn't mean it can be forced to be accepted (as many think it is). It simply means: the currency in which the dispute can be settled.

Nobody can force you to accept something you do not want.

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Knowledge is power! thanks a lot darth ⚡️
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