If transacting in certain cryptocurrencies is prohibited, then any money traded for these cryptocurrencies is quite literally acquired through illegal means.
If the money was earned from legal activity, I don't think a conversion to crypto is technically money laundering either.
Perhaps the profit from holding cryptocurrencies could be considered laundered once converted back to INR since the profit itself was illegally earned.
Perhaps the profit from holding cryptocurrencies could be considered laundered once converted back to INR since the profit itself was illegally earned.