Counter question to the OP: Why are you here?
Mate, he already answered it here. :v
Yes Sir, it is My Main Reason for Choosing Bitcointalk, Bitcointalk is one of the Best Forum where we Can Increase our Skill about any Topic.
Bitcointalk.org is one of the most comprehensive forum ever to discuss bitcoin as well as others including altcoin. This is a bitcoin forum dedicated by satoshi for the community, but you are free to choose any platform you find interesting to gain knowledge, discuss it and do whatever you want.