No, within Europe you have very good countries from a tax point of view such as Andorra or Estonia, and countries that for example have good conditions for Crypto such as Portugal.

In Spain if you declare crypto sales you will be treated as a criminal and you will be inspected by the tax authorities.

Besides, Spain is one of the most corrupt countries in the European Union and has no legal security. I recommend it for vacations because it is a beautiful place, good weather and good food, but it is not the right country to do business.