Now according to "BitcoinVenezuela.com" 1 BTC is worth 253,188,000 USD so if this is true I have around 50,000 USD with me.
I see this in that site-
Well, sometimes price may vary in different countries. For instance, even though the price of bitcoin was around $8000, it was $24000 almost in Iran some days ago because of the high demand. In case, the price of BTC is high in any specific country, you have to get the exchange where it's being traded at that price. If you can trade at that exchange, you can also sell at that high price. I guess you have the basic knowledge of trading; at least how price increases or decreases.
However, it may not possible to sell high in such case for people outside the country because the price fluctuation happens in Local exchanges which other citizen may not have the permission to exchange or they may not have the access of their local currency.