I really don't know that information, but if you know how much BTC was sold to bring the price down to $17k feel free to share it
Of course, I don't know the numbers but by telling on some information (that could be totally wrong), we could strat with the amount of bitcoins that have been sent extra to the cold hot wallets and cold wallets of exchanges during the drop, and the number shows only an increase of 100k in all coins stored on exchanges in the first two weeks of May (thanks Terra
)and a 70k uptick during the June drop. Of course, not all of these could have ended being sold and at the same time probably a lot that was stored there could have been the target of the sale, at the same time a lot of the accumulation of coins happened after the event when people were rushing coins there and on the same time a lot was rushing cash.
Anyhow, my point is that a lot underestimate what the instant liquidation of 5000 would have but hopefully this will never happen, as there is no point in it other than intentionally harming the market.
This is however what makes Bitcoin halvings so important: miners "drain" money out of the Bitcoin ecosystem by paying their hardware and electricity suppliers. Each halving means they have less Bitcoin to sell, which means this "drain" gets less every 4 years.
And while this halving stops miners from "draining" that much money it also halves the maximum possible security of the network.
So rather than that, I would say that the Bitcoin defense budget gets halved every 4 years.