Did many people know about Bitcoin in 2009 or rather 2010, when it was created? No, not as many as today.
Cryptocurrency also started with nothing, but now there are around 21 million users or more. As people are getting to know the technology behind it, i.e., blockchain and the pros, that is driving them towards using virtual currencies.
The blockchain (the technology behind cryptocurrencies) space is growing faster than ever. As the technology is growing, more and more people got to know about the cryptocurrency and started to trade. The use cases and predictions speak a lot about the
future of cryptocurrency in 2018 and even after that.