Few things I learn't the hard way years ago:
If your not prepared to lose 100% of any investment then investing should not be a priority in life...leave you money in the bank!
If you spend so much time worrying about tomorrow you will probably have a stroke or heart attack the night before.
So my point is no matter how careful you are investing you always have risks....
Look mid/long term not short term in R/E usually but always keep cash aside.
As far as I'm concerned I never fall in love with any property investment or stock holding...everything is always for sale at a moments notice.
Stop losses always in place for any investment.
Far easier to sell into a rising market than chase one going backwards..
I would love nothing more than to see the AUD at parity with the USD but 15% overnight?/ I havn't seen that yet, nor am I expecting to in the immediate future............
Best of luck