Losing virtual money on a demo account is as easy as in real trading. Simply emotionally, you will experience the loss of real funds, and the loss of virtual funds will be unpleasant, not critical for you. And you can still talk about the risks. In the demo version, you can enter trading with a large lot without worrying about the loss, and accordingly, in the event of a favorable trend, the income will be significant. In a real account, you will try to avoid trading large lots, as the fear of losing the account is very high.