it was best said in "Antitrust".. in this business you're either a one or a zero.. alive or dead.
if you're an entrepreneur at what point do you give up on an idea? when you see a site that's similar to yours? or when money becomes an issue?
share your thoughts...
If people just don't like it at all, or no one uses your product or service maybe you have to start thinking about it.
If you are confident about your idea and passionate about your business, you should never give up because of competitors or money issues.