Caution would be more advisable

Efforts to cultivate optimism are welcome, given the fact that positive public sentiment is a required condition for economic growth. That said, Greek government officials should be reserved in their forecasts.

Moderation is especially necessary at a time of unprecedented geopolitical and economic volatility around the world, because there should be no doubt that the international environment holds many risks and the short-term (and likely long-term) future of the Greek economy depends largely on developments unfolding around us. For this reason moderation should be the guide of those making overoptimistic predictions about Greece's economic growth. 

A painful demonstration of how volatile the economic environment is - leaving aside potential geopolitical developments in the wider region - was the sudden bankruptcy of the world's oldest travel company, Thomas Cook....