Indonesian Central Bank is only bluffing. They dislike Indonesian people holding currencies other than rupiah. They don't want us Indonesian people benefiting or being rich from bitcoin. We Indonesians will not subdue to these centralized & corrupt scumbags. I still hold my bitcoins and my other alts. I couldn't wait what they are going to do next week.
Cash in? Not hardly. Get a hardware wallet is what they need to be doing.
Yes in Indonesia they can. They can withdraw money from Bitcoin Indonesia online web trading using Bank Transfer. That's why the central bank goverment threatens to ban banks that support bitcoin transaction.