Investing in bitcoin using money that is not your discretionary income can force you to sell at loss to meet your essential needs. It is important you invest in bitcoin using money that is not meant for your expenses like school fees, hospital bills and money for your basic needs. Even when you have an emergency funds, it is still necessary to invest with your discretionary income .To be able to hold for a long term, it is important to have a backup funds so that whenever an emergency occurs, you can always address the situation using your emergency funds, but this doesn't mean that you should invest using money that isn't discretionary income.
More important than how much money a person is investing is how much impact the money can have on their financial situation. Buying Bitcoin with money kept for other household expenses can never be a responsible decision. It can face significant price drops at any time. If you need money to meet an essential expense at that time, you may be forced to sell Bitcoin at a loss. It is not necessary for someone to invest their entire surplus income in Bitcoin just because they have an emergency fund. In addition to the emergency fund, the investment amount should also be determined by considering other future needs and personal financial goals. Having a backup fund is important when holding Bitcoin in the long term. Even if your financial situation is good at the time of investment, unexpected needs may arise in the future. If you have sufficient emergency funds in advance, it may be possible to meet the necessary expenses without selling the investment in such a situation. If you want to invest in Bitcoin for the long term, you should not only plan to buy regularly, but also create a financial foundation to maintain that investment.