[aussie dollar]

when i go to cronulla beach dont leave my valuables on beach either as stevem said do what you do at home and you wont have problems.
keep your cash away from prying eyes dont flash it.
suggest you use hotel safe to keep passport (keep a copy with you just in case)money and any vaulables you have.
crime in patong is much less than most towns in australia.
have never had a problem and have always felt safe.
more chance of being ripped off paying higher prices than you should when bargaining for good or services.