As i know, with all the scepticism around it, the best way to do business in Greece now - is investing in the real estate or any redevelopment progects. The market is in very good position right now, so the rent of a flat can help you to make money and later, when the price will grow, you can sell it with the profit. At least there-re many analitics, who are suggesting this.
"Prices for property in Greece are about 40% below their peak in 2008. Tranio expects prices to grow in the next 2–3 years for two reasons. First, Greece is experiencing a boom in tourism. According to the Bank of Greece, the number of international tourists, who create short-term rental property demand, grew from 15 million in 2009 to 30 million in 2017. Second, the Greek economy is in recovery. The country’s GDP grew for four straight quarters in 2017, and the European Commission expects the economy to grow by 2.5% per annum in 2018 and 2019." proof