And, sadly I heard also on my social media local that this pollution is also caused by crypto-mining,
It's probably just cryptocurrency hater. Electricity price in Indonesia[1] isn't low/attractive for miners, unless they manage to obtain recent type of Bitcoin ASIC. Besides, AFAIK there's no data which shows many miners comes from Indonesian (let alone Jakarta).
So what do you though, is crypto mining become a big problem of pollution?
No, the actual problem is how the electricity is generated.
[1]
https://www.mrfixitbali.com/electrical/electricity-supply/electricity-cost-Indonesia-240.html