When you sleep, you can make money, that is to say you are wealthy. hahaha. do you think you, who is the number one to make best money while sleeping!!!!
Who is my cosumer? that is really good course for me, as i have to systemly learn the whole process, it has to be known if you want to go through this? https://courses.edx.org/courses/course-v1:MITx+15.390.1x_CHI+1T2016/course/ https://sloanbid.mit.edu/resources/15.390.pdf