The question is that while thousands of people is joining bitcointalk today?
No, the question is why bitcointalk has become overrun by garbage shitposters in the last X number of years, and I'd say X>6, because it was just as bad when I registered as it is today--though there's been maybe some improvement because of the merit system.
C) is that bitcointalk community is a source of living a comfortable live?
Say what? I don't expect that if I asked you to clarify what you meant that you'd even see my post, but how the hell does a discussion forum provide a comfortable life for anyone? For older members, sometimes it can make them want to pull their hair out, especially if they're trying to read threads in sections like Bitcoin Discussion. That should be the most sacred of sections, and yet it's nothing but a wall-to-wall, floor-to-ceiling shitbox of crap. Haven't you noticed that?
Oh wait, are you talking about the desperate booger-eating bounty hunters who work for a month or more for a handful of scam tokens that they may or may not receive? Yeah, that'll provide a comfortable life.