http://www.theguardian.com/commentisfree/2015/feb/22/can-a-parallel-digital-currency-solve-the-greek-financial-crisis
TL;DR
Varoufakis may have considered a parallel "bitcoin-like" tax currency.
If things go badly for Greece, finance minister Yanis Varoufakis has said he would consider creating a parallel digital currency, using Bitcoin’s digital security and transparency, but doing the exact opposite of what the money fundamentalists intend.
Well, it won't be boring...
