Mme Tortue is right as usual (not so sure about being the English forum admin though
10 years is a hell of a lot of time to be talking about investment opportunities. I mean even 5 years would still not give me the comfort of investing into something even if I was a businessman with flair. Also, the investment value will obviously change in those 10 years.
Well I'm only a recent graduate, but I've noticed while keeping in touch with what's happening in my country that emerging sectors change more or less every 3 years or so. Something like a wonderful idea might work only for a while. Since we're only talking about small businesses, any change in the country's annual budget which does not go in your favour will be like a huge blow.
I think your best choice would be to work along this timeframe before you start doing some digging on what you intend to go for. Who knows? By then you could have gone somewhere else! You might have changed career or even might have earned success where you are at the moment.
According to our government website, these are the various business opportunities and the emerging sectors which are currently "flourishing" at the moment bearing in mind that they haven't updated it from last year.
Hopefully in 10 years time, things will be ideal for you to invest.