If you really think JR and JNUG will rise - I would not buy DUST - as it may come down.
In your scenario you might break even. I am loading on Gold Miners 10 of them and do expect a 2015 turn north for Gold. I am flipping too to maximize my gains .
You have to make up your own mind, have your thesis , and then become convicted in your position with an entry and exit strategy. Market has buyers and sellers.. Its a good thing people are on different sides of the fence...
Last but not least, I trade options as an aggressive money making strategy.. My time horizon is short.. days... weeks... Your may be much different... so hard for me to say if your insight is sound or not..