There are advantages to owning your own property that you should weigh in your decision.
1. The interest you pay in your mortgage payment is tax deductible, as well as the real property taxes you pay. The government is actually helping you pay for your home.
2. The value of your property in most areas will appreciate, or increase, over time. Hopefully some day you will have your home paid off, with no mortgage, so when you retire, you can live within your means. Your home will be worth more than when you purchased it, so it will be a vaulable asset.
If you compare the value of homes to the stock market, in the long run homes do pretty well. However, I am not a financial planner. I recommend consulting with a fee-based financial planner about your investment portfolio and disucss your options.
As a matter of my business the REASON that people buy and sell real estate is usually to be able to DO something. So as long as you own your own home, I would encourage you (without knowing your complete situation) NOT to sell it. If the home is too big, you might want to consider renting it out and buying a smaller home, condo, or some other alternative.
Make sure to discuss your plans with professionals who can provide you with options that will preserve your equity. Do not make a quick decision that you may regret later.
Good luck. Post if you need more help.