There are many many reasons, lets just say one of them , inflation.

My dad sent 300$ to pay some things of his house.

The exchange house only gave me BS(venezuelan currency) at the price of central bank... (36 bs per 1 dolar)

The worker we have to pay wants dolars, no BS and we cant just go to the bank to buy dolars at price of 36 BS

We have to exchange the bolivars to dolars in the streets, aka black market at price of 44 BS, thats 20% more so now we lost 60$ in the process!

Yes recently some very turbulent happened thay made me wanted to leave but i can't, i dont even have passport