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 I think the important thing was to secure some of the bitcoin to fiat then the rest you can use to grow. I'm sure you could get more than 10 BTC to grow. certainly grow bitcoin method is up to you? certainly my choice is to invest or trade altcoin"