not only beginners who lose a lot of bitcoins when investing but seniors also experience the same thing like that, which is mainly due to their greed and also not paying attention to further market analysis so they don't have time to save their assets when the bitcoin price starts to fall
I agree, I don't think there's anything that can be sure when investing will make a profit, even a trader who has been 10 years can lose even though he understands various analyzes, investment is something that has the same profit and loss opportunity, so this is not the fault of newbies.