i zoomed out as far as i could (Dow Jones, logarithmic Chart) My assumption is based on the believe of an historic trend channel.
At first, some Events, to put things into perspective:
The "Great depression" of 1929 - 1930 had Around 88 % Correction from Top to bottom.
Bretton Woods: 1971, the USA rendering the dollar a fiat currency
Lehman Brothers Collapse, Small Crash of 2008 Around 50 % Correction from Top to Bottom.
The Top of BTC will correlate with the bottom of the Stock Market. (Tripple Bottom in the end of 2020)
The Crash of 2019 - End of 2020. Around 70 % Correction from Top to bottom.
Liquidity Crisis, Trade War & the Rise of Bitcoin.
BTC acting as a non-correlating asset due to decreasing global liquidity, + the BTC halvening May 2020. XRP value will also increase & flood payment corridors with needed liquidity. (Nostro Accounts no longer needed) Nostro Accounts are needed, if a Bank uses the Swift System to transfer money international. In this Accounts is a lot money "Frozen" for settlement.