The only thing I would ask would be... When you bought MONA, and you now say that you could not withdraw that MONA when you bought it (how do you know?), why did you not sell that MONA and get your money back? Unless there was an extreme difference in buy/sell side and I mean extreme.
I won't tell you that every time I buy a coin I check that I can withdraw it.. I maybe wait about 5 minutes until I actually want to withdraw it (because holding any coin on any exchange is stupid).
I bought for 0.3btc, after the dump the price for livecoins was 0.02btc, there was no point in selling
I keep all the coins on the exchanges, as this specifics of my work, i have about 25 exchanges