Fractional chips are the way to go. Revaluing chips would confuse people and someone would lose their shirt somehow.
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.
That is simple for us to do, but it will result in misunderstanding no matter how many warnings we give. People will make mistakes about what stakes they play and size of cashouts (important if paying for something for example). People have loans and staking deals that certainly could be correctly adjusted, but we don't want to give people that hassle unexpectedly. Logs would become very confusing as well.
Fractional is more work, but it won't be long now.