Understand your time frame as well. How long are you willing to wait to get to 5000 paying users? If it's 6 months, quit now. However, if you're willing to w

Understand your time frame as well. How long are you willing to wait to get to 5000 paying users? If it's 6 months, quit now. However, if you're willing to wait several years and grow slowly, it's perfectly achievable, assuming your product isn't completely asinine.