NEW DELHI: Amid the high-stakes negotiations in Brussels over Greek debt , many Greeks have been taking their cash out of banks in large amounts.Some two billion euros (nearly $2.3 billion) was withdrawn over just three days last week. Yannis Nikolopoulos said in Athens says Monday "everyone's going (to the banks) to take money.''He said people are taking "some money to have at home for 10, 15 days; say 1,000, 500 euros, because if the banks shut it'll be a problem to go shopping."He said a deal between Greece and its creditors "is mandatory at all costs, otherwise we're doomed."Vassiliki Papanagiotou, a lawyer in Athens, is urging "prudence on both sides," warning that "otherwise Greece will collapse."The European Central Bank (ECB) again increased emergency liquidity funds for Greece's banks on Monday, according to a Greek bank source who said the ECB may renew the hike "at any time" if necessary.The new increase of the ECB's Emergency Liquidity Assistance (ELA) was the third since Wednesday and came as Greek savers continued withdrawing their money in large volumes from the country's banks.Though the total amount of the new reserve was not divulged, the Greek source said ECB "governors may meet at any time ... including today or tomorrow" to review the situation, which is likely to evolve against an emergency eurozone summit in Brussels later Monday to seek an accord on Greece's debt crisis.On Wednesday the ELA ceiling was raised by 1.1 billion euros ($1.25 billion) to 84.1 billion euros, as the rate of Greek bank withdrawals rose. On Friday the reserve was increased a further 1.8 billion euros.Greece's central bank said Greek business and private bank deposits had fallen by nearly 30 billion euros between December and April, to 128 billion euros.