Is it better to save money in bank or invest it online, in real estate or maybe gold?
For me all of the above. Save some money and invest the rest of it. I believe in this quote " Do not put all your egg in one basket"
While that kind of knowledge is useful you must also realize that there are exceptions to those rules, while I will not advice anyone to put all his money in bitcoin at the same time I could not blame a person if it did exactly that since bitcoin has been one of the best investments in history.