I would do what most of the people here will: 1- withdraw most of it to an offline wallet 2-keep around 2-3 bitcoins for trading it with altcoins as well as any investment opportunities as well, perhaps giving few bitcents of it as well "to spread the sharing 
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"Yeah, divide it into two parts and setting aside part for a long term goal and using another part for trading and earn from it... You could also use part of it to finance any business ideas that you are planning to pursue just in case...
I have some HYIP program it makes profit up to 40%/M. I will sell the bitcoin to fiat, and i will share the profit 15%/M to people who give me 10 BTC.
The way you want to make money is a bit off IMO, but it's good if that's the way you know how to make good money, and the way you think to give atleast a percentage of it to the one who give you 10 BTC is a very nice move...
Half of 10 bitcoin i will put in my bank account and the half will keep into my bitcoin wallet as my investment because i want to secure some of that that is why i put it into bank! all i know is bank is much secured than bitcoin.
That's secure...Atleast by that even when something wrong happen to bitcoin, you still have a money in bank....