The problem will be when they are all headed for the exit at once..
In other words, 19k will be a tough bone..
I think you're missing the point.
Long term holders don't head for the exit. They keep their profits in Bitcoin.
They spend their coins only when necessary, regardless of the price.
It's traders who have an "exit strategy". They're the ones who "sell" their coins based on price, "profit-taking" in fiat currencies.
Holders use Bitcoin as an investment rather than as a speculative means to acquire more fiat currencies.