I'm sure many of here profits on doing jobs such as signature campaigns and other forms of campaign, being a campaign manager, and other sorts of job that pays on cryptocurrencies.
Though personally, I prefer investment over trading, since predicting market price trend everyday would be quite difficult, especially since the market is decentralized, market movements are almost impossible to predict.
Upon investing, I could hold for months or even years, all while spending my time improving myself in my own field. You are much more in control when investing, and is generally much safer and more efficient than watching an unpredictable market, thanks to manipulation of whales and sudden shifts of market sentiment.
I think we could already consider trading as an investment, because based mainly on the definition of investment, money should be risked to gain return of profits. In that regards, when we try to put cryptocurrencies in exchanges, we are already investing our money and at the same time, contributing allot to the market price of bitcoin and other cryptocurrency.
Moving on, I don't think the only way we could earn profits from crypto is not just from the workloads that we could have here on bitcointalk. We could also earn money from doing freelance job, and might as well develop our own cryptocurrency Decentralized applications.
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