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Should I be worried and move my coins out of BitStamp?
Coins are probably fine, fiat is what you should be worried about.
Not sure about that (the "unsafe fiat", that is). Not saying the thought isn't crossing my mind either, but here's a number of reasons why I'm not that worried about the banking situation of Bitstamp:
1) Slovenia =/= Cyprus. Seriously, it's a worthwhile discussion to go through the details, but for several reasons I don't see Slovenia at a real risk for a "bail in". To name a few: bigger country, higher risk of domino effect. less foreign account holders than cyprus to my knowledge. EU already made an example of Cyprus.
2) even in cyprus, there was no "all banks bail in", I hope people know that. In particular this means that Unicredit Slovenia, a subsidiary of the Italian Unicredit, is nowhere near the level of risk of the Slovenian *state banks*, that are the main cause of the problem the Slovenian banking landscape faces.
That said, if you want to be safe, convert to btc. If you want to be really safe, withdraw those coins. Personally, I don't think it's necessary though.