RE: Passion is something that is adequate to keep us motivated

You're right and I agree with you that in most cases passion for profession does not bring enough money for life survival. Very few are the ones who are lucky and making good money however there are people who are working for the sake of money only and after a few years, they don't feel like working.
Money is certainly a requirement and its great if one can have a balance between earning and passion with profession. Thanks.