I believe bitcoin is every bit as sound as fiat ( not a complement)
It's also not a bubble ( it will never go to zero, not even close. )
Most people who own bitcoin are staunch bitcoin supporters who never exit their positions. They just continue to add. This drives the price up.
When there's a downward trend from folks selling, the weak are flushed out and it triggers a sell off.
In early May of 2021 it was at $58k. In late May of 2021 it was $35k. So in less than 30 days it lost 40%
It recovered back to the $60k level by Nov 2021, then folks cashed out for profit again and this time it fell to below $20k by the end of 2022.
So from Nov '21 to Nov '22 it lost 74%
So was that a bubble?
By March 2024 it recovered back to the mid $60k level, and just recently has rocketed to the level of sniffing $100k.
It's a fucking rollercoaster that right now happens to be going up.
One could argue that every time there is a sell off, the non-believers exit and the faithful remain - which should calcify its value. But there will always be a risk that a moonshot will be followed by a sharp fall from people taking profit.
Note - This doesn't really make it any different than any other stock out there. It behaves like a meme stonk.
But if you happen to have $100k just laying around, I would not suggest running out and buying a single bitcoin at this point.
Disclaimer: I was making the same call at $10k - so take what I say with a grain of salt.