I could've bought some week of Thanksgiving and it's value could've doubled. I could've bought some a year ago and it's value would be almost 20x. So on and so on.
In my gut, I feel this feels like mania and a crash is coming in 2018. Yet, I don't have any solid reasons outside of the things people usually say. Makes me wonder if we are all behind the times or missing something, like this is the future of the global economy.
The issue with knowing something is a bubble is that unless you know when the bubble is going to pop its nearly useless knowledge.
Bitcoin has demonstrated that the end of the bubble is NOT obvious and that there has been plenty of money to be made. My recommendation (what I did) is buy some amount of bitcoin in the off chance that its worth a million dollars in a few years. Because bitcoin is a deflationary system there is at least a good reason to think it will rise in value forever.