You're just really lucky that when you invested in bitcoin, it is still not doing an astonishing bullrun. Bitcoin is just speculated to be a highly valued asset so people got the FOMO. There's no accurate method to get rich quick in my opinion, it just happens that some big risk give you big rewards.
Did you read the thread at all apart from the post headline itself ? Things like this is actually the reason more people panic sell, when they read a post title... Bang! They rush to sell without bothering to read what the main content is all about.
The OP is not talking about him investing in Bitcoin and getting rich quick... The title to his post is just about a series by one Dave Fishwick, creator of Bank of Dave, discussing Crypto currencies which method if used well can be use in other investment as well.
Same reason behind this opinion why businesses fail in 2 years and they struggle to survive after 6 months. Generally, people only care about how to get more money and they usually don't care about the possible ways. Capitalism forces poor people to look for alternative options in order to get rich quickly.