Quote from JohnathanIII:
Take a look at this video and if you are still in funny mood. Then you my friend are a nutcase. By the way my source has nothing to do with this video. This video is public information for long time now.
http://www.stansberryresearch.com/pro/1011PSIENDVD/PPSIM116/PR
You're really not worth helping, but in case anyone who isn't a retard is wondering about this question:
a) profits are made in terms of the currency in which the security is held. Thus a USD-denominated put on the DJIA will yield profits in USD. Thus if you have a CAD-denominated account and the USD.CAD and the DJIA goes to near-zero, you will have very little CAD profit. However if you hedge the currency risk you will make money. Ultimately you are long USD if you buy puts.
You could sell futures and convert the proceeds to CAD immediately. If it then collapses you will make money.
b) A collapse of both USD and DJIA is highly unlikely imo but if it were to happen it will be almost impossible to actually profit from it as a non-US citizen.
c) As a US citizen, the smartest way to profit from a US market collapse is to buy yourself a shitload of whatever won't collapse with the not-yet worthless USD, like assets in emerging markets or whatever.
Edit: in other words going short into a collapse of something is a lot less smart than going long on the spread between whatever won't collapse, for example the USD.CAD pair as you appear to already appear to have been working into..

You'll have better chances in making sure your crystal ball is always clean. Good Luck.