Recently I came upon this bit on the internet. And I assume that the pattern will come to pass.
1785 the US adopts the dollar as official currency.
80 years later President Lincoln is assassinated after issuing paper money called Greenbacks. The same year civil war ends.
80 years after Lincoln’s death President Franklin D. Roosevelt suddenly died of a cerebral hemorrhage in 1945. The year World War II ends
80 years after is 2025.
President McKinley assassinated 1902 after the Gold Standard Act
62 years after President Kennedy assassinated 1963
62 years later is 2025
2025 is 144th year from 1881 when President Garfield was assassinated.
Kennedy youngest President ever elected.
President Trump is the oldest President to assume office.