There is income tax (interest / gains on stocks / crypto etc is not seen as income). And there is tax on your valuable possessions on the first of January, exc

There is income tax (interest / gains on stocks / crypto etc is not seen as income). And there is tax on your valuable possessions on the first of January, exceeding 25.000 a person, so 50.000 if you're together, ex. your first home and substantial ownership of a company. First home is tax free. Subtantial company ownership is taxed differently. Valuable possessions include art and cars kept only as investment (gray area), cash (exceeding a certain limit), crypto currencies, second home(s), stocks, bonds, savings.. but not the things you use in your household, such as the family car(s)..