What percentage of someone's income do you think is advised to be used for trading?
This depends on what the person has in his or her possession and willing to risk to trade with. But it should be the minimal amount of money you know you can possibly risk in a game and still feel not bothered when lost to trading. 2% or 1% of a person’s income may vary for different persons on the total price it will amount to and also could vary on the amount they’ll be willing to lose in a trade, so the percentage of the actual income to risk depends on the person and the amount they’re willing to lose.
The most appropriate percentage of income to use in trading will depend on the level of responsibilities that they have, a trader can afford to loose 2% of their income, while another can afford to loose 5%. There are some traders with lesser responsibilities that can afford to loose greater percentage of their incomes and they can use up to 10% and more as the amount that they can afford to loose. But ideally I think that it should be between 5% and bellow because trading is risky, you can use a higher percentage and lose everything, so it is better to minimize risk by using amounts that you can lose and move on. We should not compare the amount that we choose to trade with other traders because what we can afford to loose might differ from theirs.