I completely agree with you on the value of time.
I have played a lot of poker, both live and online. I have seen an unbelievable amount of ridiculous bad beats happen over the years when playing online poker. Sure, you see your share of bad beats when playing live, but nothing compared to playing online.
Like others have already said, there are rigged online poker networks. In fact, I wouldn't be surprised if they are all rigged to some degree. After all, the more money in the pot the more rake they get. Thus, fish play would be encouraged.
So you could spend hours studying poker and come up with a great strategy, but still not be profitable because of rigged software. All these bad beats can take a toll and you could end up tilting.
Also, there are completely different strategies and risks associated with no limit vs. limit, cash games, SnG's, and tournaments. For instance, you could do well playing in nl cash games for hours. But then on one hand you could lose all your profit by getting KK and another player has AA (happens all the time in online poker and rarely does the K hit). With tournaments, you could spend hours playing only to lose on or near the bubble.
On the other hand, you have SnG's which are less risky but also have a lower margin of profit. So you could spend hours to only make a few bucks.
I don't want to discourage you. I just wanted you to know my experience with poker over the years and the reality of it. It was a big time waster for me and of all the hundreds (if not thousands) of hours I spent playing I probably made a couple hundred bucks (maybe not even that because I've never calculated it all up).
As for trading, I am new to it myself and only have a couple months of experience. So I'm not really in a position to give you advice on that. But so far it doesn't seem to be rigged anywhere near as much as online poker...