It is already stated on the name or brand of the thing we are using right now. It is called cryptoCURRENCY, so basically it is a currency of the Internet. We cannot access Crypto's without Internet. The choices in the question are somewhat the same so whatever the choice is, it is basically synonymous. Cryptocurrency is useful nowadays and it is steadily developing. We just need to support it properly and use it in a not abusive way because it is the best way to at least promote it and make it usable for all.
Correct, it is a currency by its name but the use of this technology today is for investment purposes and I don't think that it is a currency anymore because it became an investment medium. Crypto currencies these days are very popular especially to those techie people that are literate in terms of technology and the community keeps on growing each year because more and more people are getting curious about this thing called "Bitcoin" and most of them or the majority of the people that are entering the crypto currency world are only here to get profit and earn money by investing without knowing the sole purpose of this technology/innovation.
We just need to support it properly and use it in a not abusive way because it is the best way to at least promote it and make it usable for all.
The sad truth is that a lot of people use it in an abusive way and gain a lot of profit with this kind of dirty methods like spreading FUD and manipulating the price or value of Bitcoin, but this kind of scenarios are expected in this kind of industry.