Doubling Of Initial Equity

[Brian M.]

I'm new to real estate investing and hope to make it a successful career over the next 30 years. I plan on making my first investment in the next 12 months hopefully when the housing market cools down a bit. My questions are:

If the initial equity I put into a buying an investment home is $100K ($90K DP and $10K rebab), is it best to sell the property when my initial equity doubles and use the $200K to purchase a larger property? 

Is there a scenario when it makes more sense to continue to hold the property even after the initial equity has doubled? 

Thanks.