Your goal amount should be based on a few factors: your budget, constituents, and your outreach capacity. It’s said that the average donation from an individual is about 60 euros, and about one in three people who take the time to visit your campaign will give during its run.
The rule of seven offers some guidance on how much communication it takes to reach that goal: you can expect to reach out to someone about seven times before they will actually take action on a request. For example, if your goal is 5,000 euro, and one out of three people contacted will give 60 euro, you would need to reach out to about 228 people at least seven times to reach that goal. Consider your capacity of outreach, what you need to cover costs, and who your constituents are before setting your goal amount.