Set up a plan for yourself in advance and try to follow it. This plan should include the path you choose (what kind of trade you can do), how fast you need to go (amount of earnings) and what you have to do to avoid falling into the pits (management of risks and feelings). But, first of all, how prepared are you to set off on this road? If you need to learn a little more, do not ignore it.
More like how much can they lose.
Investing in cryptocurrencies is not that easy. As an investor, you should not always look at how much you can earn but also on how you could lose it and how you could reduce the risk that you are taking. I think you should not always manage your feelings first if you can't even manage your balance well.
That is what you called risk and reward ratio, before we trade we should know how high the risks in order for us to know if we can handle it or not. The rewards are is should greater than the risks in order for us to have good trade. Buying coins that have low potential rewards are just waste of time and money. We should learn to use our skills in identifying worth it altcoins in the market.