he went and sold his property to invest on Bitcoin without been knowledgeable about it. he went ahead and invest but loss everything because he doesn't know how to trade Bitcoin.
Do not get it wrong, your friend did not invested in bitcoin, he was trading which is another thing entirely. Bitcoin ATH is $69000. Bitcoin today price is $29800 now. If he invested in bitcoin at ATH, he would nit have lost everything. Bitcoin will still get to $69000 and increase above.
If he invested in bitcoin, time of profit will come even if he invested at the wrong time.
Anyone that want to invest in bitcoin can gain more if they are able to make research about bitcoin price, bitcoin halving and following the latest news like spot bitcoin ETF in United States.