So if you want to earn more money, you can do both things, the more, the merrier,
What you do, not necessarily other people can do it, profit/lots of money, not only in trading and investing in crypto, lots of money can also be found outside/with real business.
Indeed investment and trading in crypto must have the skills and knowledge, but that cannot be just talking, must really understand it all because investing and trading in crypto has a high risk.
Study, graph, analyze, understand, thorough, patient, and get to know the game system of the market in trading and investing is the capital for success.
For me both are good to get earn and both have risk to take particularly in an investing. Also before do trading or investing we must have knowledge how it works and a little background to our coin holding. Do trading we need to know if the market id pumping before do trading while investing we need to take a risk by putting our money in an investment to grow, but its better to put a small amount to invest then little risk to take.