Don't Wait If You Don't Want to Spend
If you don't want to spend a ton of money on your next phone there's no sense in waiting around for the iPhone.
We could see Apple adjust its pricing in 2019 and 2020, but we don't expect massive price cuts given the technology that's reportedly on board the devices.
If you can't or don't want to shell out $700-$1000 (or more) for your next smartphone, you'll probably want to look at other options.
There are a slew of inexpensive iPhone options to look at and there are also a ton of cheap Android alternatives on the market right now.