Did you ever have a start-up that never fully took off?

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Anyone who has a business idea will start their business with a start-up, this usually gets you started on a business venture that you have and then can pave the way for a more successful business in the future. Unfortunately, for some people, success isn't always the final outcome some though and often, a start-up can land in an unsuccessful one no matter how many times they try to make changes in hopes it will gain traction. 

Have you ever had a start-up that unfortunately didn't take off as you hoped? What do you feel went wrong?