Hence the sentence in parentheses. It used to be true for everyone. Now there are other options, but there's still a lot of people who use the standard one in absolute numbers. Plus all the exchanges, payment processors and other third party services which all rely on it.

Even if you don't personally keep your coins online, a hacker that scores a million coins on a zero day is enough to plunge the value for a long time. You still lose either way.

The point is that this hasn't happened. Even though it sort of should have. That's remarkable.