The cycle of nature is not exactly 7 years. It is actually 7 years and 2 months, and more specifically the cycle of nature is 2.618 days. Which is not a random number, it is pfi+1. A golden ratio. The same cycle occurs with everything in nature, like the economy.
2.618 is 2x7x11x17, which is also 1000*(phi+1)
So I would guess that the boom will happen in Q1 of 2023. That is when the US runs out of money. They did a favor to the economy and let the US get a free-loan one last time. And raise the debt ceiling for a last time. A legislation was passed that allowed for one and only one time, the last time, to borrow without the vote of the Republicans. I don't live in the US so take what I say with a grain of salt, I don't know the specifics of the Constitution and how US Politics work. I know one thing, that I know nothing. And this is a quote I stole from one of my ancestors.
The Great Bankruptcy is coming...