So if you want to earn more money, you can do both things, the more, the merrier, if you are a beginner, then don't invest and trade significant amount of money because you may fail from it, you should do research first before doing that because it is not a simple thing, you should have an excellent knowledge and skill to be successful in both methods.
Everyone wants to earn cash and I can go out and say that every one wants to have a financially stable life, I can't disagree with that. But one thing I advice for people who wants to trade and invest, and it is to try other forms of investing such as mutual funds or stock market, they are safe investments although there is a taxation involved but it can still help in making a diversified sources of income, investing solely in cryptocurrency isn't bad but you can't dividends when you invest in them unlike stocks or mutual fund that gives dividends which is different from your main investment, it is your profit for owning a part of that company. I am saying this to not put on a hate in cryptocurrency, I am merely reminding people that there are options that is equally worth it.