use 50% as an investment in some alt coins 4 or5 , they other 50% will keep you save hold and wait for BTCse again sell and buy again
I think it is a little early thinking that having a 10 BTC will be making you a billionaire. We all know that when bitcoin experience a dump, some altcoins follow. I think it is better if you can convert them into real money and then buy another coins when it dump.