Really dependent on which mythology's dragon you become. That aside, being a dragon in modern day would probably be very hazardous. Better hope you're a small enough dragon to not cause much property damage while figuring out your new body, and to stay mostly undetected, because otherwise you're likely to end up dead, or in captivity somewhere in fairly short order.
Assuming D&D lore, polymorph fixes that problem pretty easily. A polymorphed dragon could blend into society pretty well, and if you want, you could still get a ride into international waters (to avoid setting off national airspace warnings), fly down to some random jungle tribe, and be worshipped as a god. Plus nigh immortality (assuming aging only affects your polymorphed form and you continue to age at the rate of your dragon-self).
I was gonna say, if a snake like Donald Trump or Boris Johnson can get ahead in this life then a Dragon would be the perfect political figurehead for people to worship support.