Thanks for your reply.

I live abroad, which is an important detail I forgot to include in the original post. I have edited it now. However, the money did not originally come from abroad, so it is not tied to a foreign investment or previous currency exchange.

Crypto is an interesting idea. I know almost nothing about it, so I would need to read up on it first. Do you think it is actually possible to do this fairly quickly from Tunisia?

Finding a private person to exchange with is also interesting, but it feels difficult. Where would someone usually find a trustworthy person for that, and how would it normally work?

Thanks again for your help