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Possible, perhaps, "not a problem", seems pretty untrue. How exactly would someone go about cashing out $200k worth of bitcoin?

Sell on an exchange. The big ones have a monthly trade volume of 100k+ BTC ($50+ million): http://bitcoinity.org/markets/list?currency=ALL&span=30d Clearly $200k is a drop in the bucket for them.

I sold $800k US of bitcoin on bitstamp market earlier this year - i did it over 30 minutes and it dropped the spot price about $6