Obviously you are going to get very different answers on this type of thread, and what it comes down to is what you feel comfortable with doing.  There are tons of different options people may pitch on here; but what it comes down too, is that you take the time and look into these investment choices and choose the one you feel is "the best".

Now, I would probably take however many bitcoins and buy an oz. of gold and probably a couple oz's of silver, which will probably leave you ~7ish Bitcoins left.  I would keep 1-1.5 in a personal wallet to readily access, 3-3.5 BTC in cold storage, then I would look at your options for the remaining Bitcoins remaining in altcoins.  Now, I know that you and a lot of people consider altcoins as P&D scams, but there are seriously some good stuff that has just came out and old ones that have had serious renovations to them that make them a fair coin that gives users different benefits from just your average Bitcoin blockchain type of coin.

There is a lot of hype around Ethereum right now, which is a completely different animal from Bitcoin and any other cryptocurrency for that matter, and it might work well and become very successful in the future... from what I've gathered, it's just a token to work on a decentralized cloud sort of database.  Then you have "anonymous" cryptonote coins, and the one that I've seen that has the "fairest" launch and distribution is Monero... XMR also is doing some pretty ground breaking technology with regard to Ring CT and is interesting (to me atleast); and also you can pay any bitcoin address with Monero anonymously by using XMR.to .

If altcoins doesn't suit your fancy, then I would probably suggest dishing out another .5 BTC to another wallet you might like to gamble with; me personally, I like gambling on golf matches, because I like to watch golf and know a little bit when it comes to who is who, and who might do good in a specific event... plus you get pretty ridiculous odds when you bet on someone to win.  I put like .02 on some guy that I thought would win, and he came like 2 strokes away to winning; which would have won me somewhere close to like 3 BTC.

All in all, there is a lot you can do... just do your own research and see what you think is right to do with that sort of capital.  However, like everyone has said before, I would store a decent amount in cold storage for long term holding purposes because you never will know what will happen to the price a couple years down the road (whether that's good or bad).

Good luck!