I think will be good idea if you should use that for trading and I also Agreed with wildworld invest in gold that a good future to get profit..Just my opinion
12BTC for trading is huge amount and it mostly cause him loose.. but if he have knowledge and experience about Arbitrage Trading then he may use them in That field. but for the simple trading 2 to 3 btc is enough. even if it is altcoin trading then I think he should start with 0.2 to 0.5BTC.
If you like to have big profits on trading then as long as you are ready to risk the 12 btc in trading then proceed just be sure that you are knowledgeable with it because possible big decent amounts of profits is there but also the risk of lossing all is there also and its normal in trading.
If we keep on thinking about the risk associated with investment then we will never be able to make profits if you want your money to grow in long term then you need to take those risks.