Making $1M a year from a startup worth $5M is a pretty interesting problem to have. Someone comes along and offers you $5M to buy it. Do you sell? Or keep collecting $1M in profit every year? If you sell you've now got $5M in the bank. You can invest the cash or start another company. You could also take a few years off and chill. Let someone else takes all the risk from here. But if you keep the business, you could make that same $5M over the next five years. Plus still own the…