There obviously won't be an indefinite bull market, but why are you so confident it will happen next year?

I am not, nobody is ... But a lot of people more knowledgeable than me in this area say it's highly probable we'll have one next year or early 2021. The 'when' don't matter much in this context, alot of people are expecting one and it's coming which makes it an ideal time to IPO

Yield inversion chart has been a reliable indicator for nearly all recessions