Some dude at the bus station wants to know what bitcoin is.
you don't have much time and he won't be able to take in to much information.
a simple look it up online won't do, because that's not interesting enough to read a lot of boring stuff online.
What are 2-3 short(!) key features of bitcoin, which i could tell him, so that he has a basic understanding what it is? And of course so he will be interested to learn more about it.
I think them that bitcoin is money you can use bitcoin to transfer all over the world without hassle without any real identity you can make your wallet fast.
Also you can tell them that you use bitcoin as payment online for some stores..