In fact I remember that in Forex trading one of the most renowned traders, called Jarret, used to earn at most a 3% monthly return, but apparently in crypto trading the proportions of reality have been lost and everyone wants to win 100% every week.
I would rather say it's about high crypto market volatility, than lost of reality borders. Everyone here is looking for something new and that's making hype. What is impossible for the Forex for example is ordinary thing for crypto market. Probably in a future we will see (God save us!) the same temps of growth like on traditional market, but I hope this is a far future.