It is really easy to send and easy to receive so I really think that is the reason why people should really use it,
And the fluctuation of the price is really something that we could use to earn if we could just predict what would happen next.
You are right. Bitcoin also doesn't need much knowledge to earn and very easy to invest because its price absolutely increases strongly (It is very hard to lose price). It is suitable for all people from young to old, students can use it too. I myself earn Bitcoin to pay school fee and I'm very proud of me.
It is mainly needed to have a knowledge in bitcoins as you go and invest. Just like now if you are not aware in August and what you will do with your bitcoins it might have a possibility to lose all your money .Knowledge before investing is really needed .