There is no blockchain balance. Blockchain is a technology system, not related to economy. Bitcoin is a payment made to promote blockchain technology. You can convert
Bitcoin to cash on exchange through the exchange, you can find a seller from a country you are on
https://localbitcoins.com.
You have a good idea about blockchain and bitcoin, I got more interesting knowledge. Looking forward to receiving more from you. The crypto market is flourishing and I think this is the best time to invest.