where will it be in a year

I ran the figures in the recent investor briefing through a spreadsheet and the potential earnings per share from the US traffic operations alone are massive.

The company has a near monopoly on the market, long term contracts and near exponential growth with practivally fixed overheads.

I currently hold 10,000 shares and am wondering whether or not to double that. The only thing holding me back is that it would be getting on for 20% of my portfolio and so undermine my diversification.

So, any predictions for the 12 month share price and reasons please.

Regards,
The optimist!