Hi Matteo, great question.
USDC is a stablecoin based on the US Dollar and it is perfect for this situation. You can trade between Bitcoin (or whatever) and USDC. This would eliminate fluctuations between USD and your local currency (EUR).
So a trading pair of BTC/USDC would net the same results of a BTC/USD trading pair.
Here’s an article covering it: https://crypto-ml.com/what-is-the-usdc-stablecoin/
And yes, please ask these sort of questions here. I think it will benefit others. Thanks!