I think the most secure trading is to use some money from trading capital and use money that will not be in use for the near future,
for example I have $ 1000 and I need to use the money for my family's living needs, then I can use $ 250 for trading and the rest to survive, do you mean from this revelation?
this method is used so that you are not too depressed if the money you have stuck in the expensive price.
This strategy is already mainstream actually done by many traders, they will not use all their money in trading because
it is risky for their finances, which is why managing finances is necessary, so you know the right allocation for all thing
it is really not reasonable to spend all of your money including budget for the survival of your family for trading. That is not financially sound and it just shows that the person who does this is not a professional trader. An experienced trader have risk management and not put all of their eggs in just 1 basket.