First, it's always great to recognize that you have a good problem :) Owning a rental that cash flows well and having generated equity along the way is a great achievement. Congrats! As for what to do with your property, there's really no easy answer. It depends on your goals. You'll likely get a 100 different opinions that point you in 100 different directions. That being said, here's my opinion:
I wouldn't try to time the market. While it may go down in the short term, housing is generally in limited supply and most macro trends point towards a growing population of renters. If you're feeling conservative, I'd continue to rent it and generate the cash flow. Once you get to a point where you can refinance the house, you can pull out some of the equity and use to invest in your next property.
If you're feeling like you're ready for some risk, then you can try the route of selling and doing a 1031 exchange to trade up into into a larger property that generates more income (and, more work) for you. There are a lot of little details to iron out when it comes to an exchange, so do your homework and engage with an accountant/tax professional/1031 specialist to know what you're getting into.
Personally, I think if you've already got a good cash flowing property on your hands AND you've got equity to put into another property, then there shouldn't be any rush to sell. Take your other equity and put it to use in finding your next property.
Good luck and keep us updated!