The bet is that there will be hyperinflation soon (and that you won't have to default on the loan), devaluing the money you'd owe the bank.

I have my doubt though that a 50 year loan would have fixed interest rates rather than being index adjusted or something like that.

Unless I'm missing something, the only way you make money is if the inflation rate exceeds the interest rate on your mortgage. A 50-year mortgage is not going to have a good interest rate. Also, it is unlikely that your wage is going to match inflation (although it will increase so e due to inflation and maybe if you build a career you'll have a higher paid job ofc, but that isn't directly relevant to the post). The only way this makes sense is if there's a few years of massive massive inflation that beats your 50yr mortgage's rate, and I you have enough stonks to generate a useful return so you can pay down your loan balance for the inflation kicks in. I suppose you could also refinance at that point as well to a shorter term.

It's not "120 IQ" it's the usual financial gaming/hedging/shorting and carries a fair amount of risk. I don't have much of any faith in the US/western real economy, but I also know "the house always wins".

The more conservative move (so you don't have to fret about finances) is:

• Have a lot of money (of course)
• put the money in your retirement stonks (mutual fund etc) targeting a ~5% return and just let it ride
• take a mortgage on a reasonably priced home at the lowest interest rate you can afford
• short terms (15 years) = lower rates (key being that it's below the 5%) = free money cause your stonks go up faster than your mortgage interest
• if inflation kicks in, you can pay off the debt earlier cause your stonks will go up faster

If you pay it off early?

• use excess funds to fund socialist activities or whatever
• move to a nicer home that you can reasonably afford with equity in your old home, higher wages than when you were younger, and take another low interest short term mortgage

$1 million USD now > $1 million USD after

As the borrower you get to have the $1m now, the lender gets the $1m + interest later.

Me neither, and I wouldn't take financial advice from a twice-stolen shitpost