There are many people who invest in bitcoins but withdraw money from that invested bitcoins to feed their family money I think their bitcoin investment is not worth it. So all of us bitcoin investors should keep in mind that when we need money we don't have to withdraw from our bitcoin investment.
Of course you are right but however the reason why most investors normally ran into trouble in times of there Bitcoin investment is that they always think in one direction instead of evaluating what could possibly happen if taking some certain decision while investmenting because for every investment or business to be successful there most be some proper planning such as having a back up strategy that if something should happen along the line it could be easily taking care without interrupting your investment.
However one of the things i understand from most investors is that they have this feeling that by using DCA strategy they are completely saved from any unforseen circumstances, actually it doesn't work that way and perhaps even if you are using DCA you could still ran into trouble if there is no proper planning because there is no way you will not ran into trouble if you invest all your money using DCA strategy without any emergency funds that will take care of other needs if arises.