You wouldn't transfer $10; that's just an example. You would split your transaction in such a way as to reflect the maximum permissible exposure you are comfort

You wouldn't transfer $10; that's just an example. You would split your transaction in such a way as to reflect the maximum permissible exposure you are comfortable with (the largest amount you're willing to risk losing - not forgetting the other transactions you may have on the table elsewhere). If this value is $100 you probably have no business dealing with Bitcoin anyway. If, on the other hand you're the guy trying to cash out $500k worth of BTC, a $25k loss is probably acceptable risk so you might exchange your $500k over 20 independent transactions of $25k each. In reality, you're not going to be able to sell $500k of BTC in a day anyway, so it's difficult to see this process as onerous -- it's just part of the game.