I don't think they are going to go through with it, and even if they do Bitcoin is very censorship resistant. The people will still find a way to utilize the technology somehow, and the country will be left behind in the blockchain revolution we'll probably see in the next decade or so.
it is very unfortunate if it happens because we know bitcoin users in Indonesia is very much, do not let them move the bow just because what they have is prohibited while other countries can accept, I think this need a special study from the government again about bitcoin