Some of us don't care that trading profit comes from others. We should always expect low profit from trading transactions. Other people are also doing their best to protect their trading capital. As several coins investment, we shouldn't choose any one pair to make transactions.
To protect trading the capital, investors must control their emotions, very many investors make the wrong decision because of their greed to get big profits in a short time, so that makes them forget to use a stop losses strategy. Investors must be able to avoid mistakes and greed because greed will always make investors lose their money.