I'm not sure how your stuff works over there, but it probably depends on who you're with..
It's helpful to read the terms and conditions of a site, for example: in my country, vanguard state that you are the owner of the assets you hold with them so it doesn't become their property and can't be deemed as such in legal terms.
If banks are bailed out, you're going to do a lot better holding stocks than you are holding cash (normally). Everything takes a hit in a crisis but most stuff bounces back. If you're trying to live of a rothira or a 401k you'll see your stock price change quite a bit and your entire net worth, dividends may change but ceos are discouraged from doing that as it makes the company look unstable so unless it's really necessary they won't.
So if the Stock itself poops the bed and loses 90% of its value , then you are losing 90% of your value that you hold in that stock due to holding the 401K or ROTH IRA? Do you get to choose your stock or asset that you want your 401K or ROTH IRA to hold or it isn't up to you to choose?
Depends on who you go with. I think most would rather you buy lumps of etfs or mutual funds , (S&P500, DJ, FTSE, EUROPEAN MARKETS, BRICS). Some let you buy even more diversified managed funds.
They normally won't give you something that can fall 90% otherwise therell probably be other huge issues to deal with in the world.
I wouldn't trust them not to take my money realistically...They've robbed the citizens during the period of the gold standard where they took the gold of the citizens.
Only reasonable way to get around this would be crypto.
There was a Greek guy on here a few years back saying he lost 25% of everything as Greece started taxing certain bank accounts.