As per OP, bitcoin may be a bubble but for the people who believe into the all potential of bitcoins, bitcoin's so far growth is real growth in ratio with bitcoin's power and potential. So, we may continue investing with bitcoin without hesitations.
Yeah, anyone who thinks bitcoin is a ponzi or a bubble would be kidding themselves. I mean think about it there is really nothing that would be even remotely close to that, these things do not just go up, bitcoin goes down a lot as well, it is finances. If you think something that constantly goes up is a bubble, what are we going to say about stock market? Have you seen how much it increased in the last 10 years? Even in the pandemic period?
There are so many stocks that went 2x even more during pandemic, look at amazon and tesla, they are ballooned up. Are they bubbles as well? If the whole stock market is a bubble that has been going on for over 100 years, then I think it is going to be fine for me that bitcoin is a bubble like that, because that bubble has been going on for over century so let bitcoin be over a century year old and I will be dead anyway.