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.
in blockchain you can only do shipping transactions and not to look for bitcoin funds. for that you need exchange and localbitcoins is one place to convert your btc into fiat. for you to make a quick disbursement. it is the best way to dilute your bitcoin fund. and the limit of transaction limit is usually set by a certain exchange