I understand different people have different purpose before they make a decision to do anything. My younger brother first invited me on BitcoinTalk as I have huge interests in crypto space. First few weeks were nothing special for me since I can have any information now a days from google search. But as the days were going my realisations were getting stronger that I am really learning some stuffs which I may never had any clue whatsoever, even to go for searching it. I would never encountered the topics like how to sign a message or even what is BBCode type lessons.

They say, if you hangup with 5 millionaires, you will be the sixth. You can not measure everything with money. I am here talking about knowledge and skills for life.

Here are an ongoing list of topics that benefited me to learn new skills (thanks to the BitcoinTalk community):
How to sign a Bitcoin address to prove ownership (archive): Thanks to shorena for the awesome tutorial.
How to sign an ETH address: Thanks to hilariousandco
PGP/GPG Signed Message - Public Key (archive): I could not find an English version of the lessons however I ended up discovering The tutorial in a local board (Indonesian). I had to use google translator to understand the contents. You need to use google translator¹. Thanks to Husna QA for the brilliant effort.
Knowing about BBCode and learning it's use (archive): Thanks to roslinpl for the well presented topic.
Vanitygen: Vanity bitcoin address generator/miner [v0.22] (archive): I am still trying to get a grip on this. Thanks to samr7 for the resources.
How a feature can change the entire game of getting publicity: I am talking about BitcoinTalk signature space feature and idea of using it as signature campaign. I am a marketing guy, it helps me to identify strategies - specially marketing strategies.
Satoshi's own written topics/conversations: It's an exciting experience reading something satoshi himself typed.
...more will be added as I discover and learn.

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| The BCT PGP/GPG Public Key Database: Stake Your PGP Key Here: Honorable mention. |
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We see all these bounty hunting, easy money making, shit posting, spamming, scamming in the forum. It gives a negative impression to the visitors. But isn't it true, for the knowledge seekers (about bitcoin, crypto space, Blockchain technology) this place still is a heaven? FREE knowledge for life!

Let the conversation keep going... I would like to hear about your personal developments.

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Update:
¹ _{Inspired from other members and seeing all these educational materials I decided to create the English version of PGP Signature - Encrypt/Decrypt message - Fingerprint <== Feel free to review. Hope it helps the community.}