Keep 12 BTC and wait...
Best advice. In most cases investing Bitcoin in the Bitcoin sphere is too risky. There are very few (if any) investment opportunities that are both attractive and not a scam. Since Bitcoin is effectively functioning like a deflationary currency, you will likely realize a substantial gain in purchasing power if you just hold on to it, doing nothing.
If you want more BTC, invest more fiat. Find some work, or sell something you don't need anymore. That's easy and a lot less stressful than searching for a quality Bitcoin investment.
ya.ya.yo!