I would go to sea and have fun. With some part of money for sure, and for rest I will try to make something. Where to invest is very hard for me to tell you, everything risk. I don't see sure profit in anything. I'm learing about trading last few weeks, it's fun, there is possibility for everyone to earn good money.
Just don't believe there are easy ways for making bitcoins. It's hard to double or triple amount, very hard sometimes..
it is hard but not bad at all. trading bitcoin is really profitable. but 10 btc are too much to start trading, only 1btc enough to start trading and getting good profit. yest if you want to do arbitrage system then you need more to invest.