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.