In addition to good knowledge and understanding in investing in bitcoin as the key to success, we also need to know that investing in bitcoin will be very risky if using free money, meaning money that is not used in the near future, especially using money from debt, then investing in bitcoin will be high risk.
Because investing in bitcoin can be said to not have a high risk because if we don't sell it, we don't lose even though the price is going down. However, many beginners consider this as trivial so that they want to invest in bitcoin using money that is not free so that when the price of bitcoin goes down, there is panic or when suddenly needing money forced to sell at a low price. This often happens including to my own friend, he used all his money to invest in bitcoin but suddenly he needed money and was forced to sell some at a low price.
So in my opinion, besides needing knowledge and understanding, we also need to manage our finances in investing in bitcoin.
First of all it doesn't take much knowledge to start investing in Bitcoin. Gaining knowledge can be essential to prolong and secure your investment. Secondly, one of the fundamental main points of investment is the source of income. If you have no source of income then I think there is no need for you to invest. I don't think anyone would suggest investing if you have no source of income, there is no question of investing with debt. This may be an act of sheer folly. To invest you must first have a source of income, which is surplus after meeting your and your family's needs or an alternative source of income.