All this will now have to be abandoned. Money is money, and crimes will have to be dealth with separately.
I can foresee special crime investigation teams, which have expertise in bitcoin, being set up.
Already you have crimes involving bitcoin shooting up.
That was probably humoristic, but
If violence have been done, investigate that.
If fraud have been done, investigate that.
If illegal substances has been transacted, investigate that.
If someone has been enslaved (nonsensically/newspeakly called trafficking) then take action on that.
Money moved over the border? Has to be ignored. Can not be outlawed, just as giving someone a piece of cake against a cup of coffee in return, can not be taxed. (It they could, they would).