Sorry but France is not taxing at 8%.

You are taxed like on stock : 19% for selling movable property (if the value is more than 5000 €) plus 17,2% for social levies.

Final tax : 36,2%

And, for every 2 years of holding (except the first two), the tax on your benefice is decreased of few percents.

https://www.numerama.com/business/351151-fiscalite-impots-bitcoin-ce-quimplique-la-decision-du-conseil-detat-pour-les-cryptomonnaies.html

Keep posting i like your content !