Like what you said, its being due to the greediness of someone. Yes, this aspect will definitely eat you alive and your fund if you cant handle it properly. By means of handling is that you take each cautious before even doing or entering trading. The market of crypto iant comparable to the stocks which has a very high rate of volatility. There are projects worth to monitor but if btc moves against it then every altcoin got pulled. So this is more of a relative trading on major coins. But there are some that retain their position but not all.

As a newbie should do a 99% due diligence for yout to avoid possible losses.