Eth and BTC black swans ?

I understand that by default it is difficult to foresee or predict a black swan just by the very nature of a black swan itself, but indulge me.

Apart from quantum computing maybe making crypto less secure (or maybe something crazy with regulations) , I can't think of any immediate bitcoin black swans because it doesn't have a centralized figure behind it. What do you guys think what would be the main vulnerabilities of bitcoin that could lead to a black swan?

If we're talking about ethereum then I can imagine a black swan being for example vitalik getting caught saying something getting cancelled or getting involved in some kind of crazy scandal and because he's the face it might have a bad knock on effect on eth, but I can't think of anything like that with bitcoin.

what do you guys think?