Hopefully they won't have to go too far doing this; if BTC's value goes high enough then everyone's going to have to start playing in special micro-chips or something.  Revaluing chips would be pretty straightforward the way I described it but if they did it right as the BTC market crashed then it would be a mess -- but then again it would have been anyway as cashouts are manual and they'd be flooded with cashout requests, which might then be delayed.