HN said bitcoin was a bubble when it was at $10.
HN said bitcoin was a bubble when it hit $500.
HN said bitcoin was a bubble when it hit $4000.
HN said bitcoin was a bubble when it hit $10,000.
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.