Which country do you think has the lowest chance of someone having their bank accounts seized like happened in Cyprus?
Well, countries with an offshore banking industry have the most to lose (in terms of reputation), so I'd start offshore. But even then there'll be variation - Switzerland has been pressurised by both the US and the EU, Singapore has been seen as safe but is now thought to be under EU pressure, etc (and I don't follow this as closely as I should, so don't pay too much attention to the countries I mention - they're pointers, not recommendations). Best advice I could give would be to (a) look at offshore options, (b) have multiple accounts in different jurisdictions (to spread risk), and (c) review your decisions periodically.
Remember, too, that it'll depend on where
you are resident - a bank in Luxembourg might be a good choice for a US resident, but less so for a EU national, and likewise (but reversed) for a Caribbean bank.
And one (hopefully obvious!) option is to keep some of your wealth in Bitcoin, in several offline wallets backed up in multiple locations. It requires some work, but is arguably easier than opening and managing an offshore account.
