We should not depend fully on bitcoin because if we do it then at the time of lowering price we will not be able to eat well food at least. Physical business is more suitable because it is under the control of humans but crypto is neither control by human nor by any operating machine.
Bitcoin is indeed a good if not the best investment today because of the huge returns it can generate. But it is not a job, or can bring us daily income to cover our lives. So, it would be foolish to let our lives completely depend on bitcoin and think that it can help us have a comfortable life without having to work much. Bitcoin should only be considered as a long-term investment for the future and we need to find other sources of income to sustain our daily lives. A job with a stable income is always a top priority.