I have really mixed feeling about Cyptocurrency. Back in 2010 I found out about bitcoin and was really excited. Not Necessarily that it would replace transactions but because it was a great way to pay people under the radar for black market goods. Unfortunately that is all it was for back then and by the time and wasn't interested. Eventually more things became available on deepweb markets that I may have wanted. By then BTC was to expensive and I was paying off student loans and couldn't afford it.
Next thing you know, investors started acting like 18th century dutch tulip investors. and it is going to burst so hard. My buddy @duerstthewuerst posted a video of him when he went to a mining farm in Milwaukee (https://steemit.com/bitcoin/@duerstthewuerst/72xguv65) Just ONE of the servers cost 150 bucks in power a month. I have a rather large refrigerator that costs 75USD per year. I did the math (don't remember too lazy for the farm and it was absurd.
Even with BTC ups and downs if it continued this way it will be consuming somewhere around half the worlds energy in a couple of years. It is too a head of it's time.