Query: Why do people buy US dollars on the black market?

Relevant passages:
 <=SEP=> "A falling exchange rate is an indication of falling confidence in a currency.  Countries like Iran or Venezuela, with a managed exchange rate, set their exchange rates at a higher value than the market accepts. Such market expectations may be influenced by poor government management, interventions into markets (such as nationalising businesses) or general instability / scarcity. The governments act to manage that uncertainty by limiting the availability of foreign exchange and pegging the exchange rate.   Since there is an inadequate supply of trusted foreign currency people turn to informal exchanges in order to hedge their currency risk.  This creates a negative feedback loop.  People in government who have access to foreign exchange start to trade on informal markets, pocketing the difference in the official and unofficial rates.  The increasing gap between the two rates drives increasing informal market exchange and can result in speculative bubbles. Driving instability (or economic contradiction) is that the massive and increasing difference between the official and market exchange rates becomes a powerful form of rent for government officials. This drives further state-led rent-seeking behaviour and causes the economy to become even more unstable. If you're interested in a more formal academic study of how such parallel markets in currency arise, ""Zimbabwe’s Black Market for Foreign Exchange"" by Albert Makochekanwa at the University of Pretoria is a useful source."

 <=SEP=> "The main reason people buy dollars (or other currency) on the black market is because they are prevented from exchanging currency on the official government market. Venezuela for example restricts citizens to a maximum number of dollars the citizen can buy or sell per year, depending on various factors such as whether or not the person is studying at a foreign university. If the citizen wants to exchange more dollars than legally allowed, that person must buy or sell at the ""black"" market rate, rather than through the official/government market."

 <=SEP=> "As a Venezuelan who used to buy USD, I believe there is not better explanation than the one given to someone who actually lives and works here in Venezuela. Back in 1998 when Hugo Chavez took the presidency, we had a good economy. Fast forward 10 years laters and you could see how poor management, corruption and  communist measurements had wreaked havoc in our Economy. It was because most of the money (USD) coming in Venezuela were not invested here but instead, given away to ""pimp countries"" like Cuba. Remember, communism lasts while you have money. Back then we had an Oil Barrel going over 100$ and crazy amounts of money were coming in the country. However, little to no money was invested in the country itself. That is why some of the richest people with bank account in Swiss are Venezuelans who stole huge amounts of Oil Money.  I know this is a lot to take in, but all of this led to Venezuelan economy being the worst in The American Continent and because there is not enough money inside the country to satisfy the inner market, people would pay overprice to have anything that is bought abroad. You have to consider that only a very small amount of people can actually buy USD here in Venezuela. Back in 2013 I was doing it, I could buy about 80 usd/month with my monthly income. However, nowdays that's nearly impossible for about 99% of Venezuelans.  To Illustrate. Minimum wage = 10.000 bolivares / month Black market exchange rate (As of January 2016) = 900bs per 1usd 10.000/900 = 11,11 usd.   <<< that is what about 50% of Venezuelans earn every month. That's why this happens:  http://i.imgur.com/dPOC2e3.jpg The guy is holding a huge stack of money of the highest Venezuelan note, which he got from exchanging only 100 usd. I am a computer science engineer, the monthly income for someone like me is about 30.000 bolivares --- so that is about 34$ a month. oh dear! So finally, answering your question Q: Why do people buy USD even at this unfavorable rate? A: There are many reasons but being the main 2 the following 1.- Inflation in Venezuela is crazy high. The inflation from 2014-2015 was 241%. Which means that having The Venezuelan currency (Bolivares) in your bank account makes no sense... in two weeks you won't be able to buy half of the things you used to with the same amount of money. 2.- A huge amount of Venezuelans dream with living abroad (me included) why, you ask? well sir, it is certain that life in this country is not the best: I hope you can understand better why people in 3rd world countries and crappy economies buy USD even at an unfavorable rate. The last question was: Q: Why would Venezuela want to block the sale of dollars? A: Centralized currency management is an Economic Measure that should last 6 months tops. (This was Argentina's case in 2013) but at this point, reverting that would take quite a few years.  However, Turukawa's wikipedia link explains that very well. Regards."