> Now basically: every single attack that's been described as "theoretical" or "far-fetched" or "only existing in the mind of a paranoid person" did actually happen.

It's predictable: The ROI of attacking cryptocurrencies in this manner is high enough to make expensive attacks worthwhile. It doesn't make other expensive attacks on typical end-users worthwhile, and they remain far-fetched.

Ah, but typical end-users is only one class of targets, industry is another and there the pay-off can be substantial.