Is it worth spending time to collect Bitcoin rather than having a daily job? What I mean is that can bitcoin be more economical? Has it ever happened that people lose their investment value rather than benefit from spending it on bitcoin?
Yes it is, but I don't agree with it being used as a full-time job. I mean, it has the potential to give you good money, but not without risks that you don't actually have to think of when you have a full-time job. If you're into ICOs or campaigns, it may actually take months at a time, plus the success rate of such projects is up in the air and can't really be gauged with certainty. Therefore, although I would say that it's not in vain to spend time and effort to collect coins, I would also not agree to make it your main livelihood.