It must be pain to convert all these to fiat and use them for right causes seeing how corrupt the nation is. Also, Indian exchanges don't have much liquidity.
Is cryptocurrency not banned in India? How and why is the government officials still accepting donors in what they banned due to greed or is there something I'm missing about India and Cryptocurrency ban? Besides that's too huge to be converted at once it would cause a lot to the market price.
There was banking ban by rbi (central bank of India), but it has been overruled by supreme court (more info).
Regarding conversion, I'm not sure, this is the address if it helps: https://etherscan.io/address/0x68a99f89e475a078645f4bac491360afe255dff1