There's no assurance in terms of acquiring profits there's still risk and up and down that you may experienced but the sole motivations is when you decently earn both money and experienced, it's more on how you deal with knowledge and how you execute the potential outcomes, there are potential to earn once you already overcome greed and fear that keeps on holding you down to make mistake, your call and your decision making is very important to make that success.
You are right, there is no guarantee that we will be able to make a profit, but when we continue to learn, it will open up opportunities for us to make a profit, although not completely, but the opportunity is more open. Nothing is easy here, everything has its own risks and it will be a fear if you can't control it.
Not only fear, but greed will also arise when we make a profit and that greed will encourage us to want to make even greater profits. We must be able to control this very well, because if not, it will make us lose control of ourselves and will make us irresponsible for the trades we make. Maybe we will miss important things that we shouldn't miss.