I think it's higher than this. I think it's closer to 20%. Part of the reason is infertility. Basically the birth rate is continuing to decline and seems like it will converge to around 50% of what it was. This means that even normal mortality won't be replaced with new births. Thus, population declines by closer to 20% or 1.5B in 5 years. 0.96^5~20%
Unfortunately I'm finding confirmations
https://mobile.twitter.com/ZFreeFoundation/status/1542607293233205249
If beef gets too expensive for most people then mushrooms are a much more likely alternative IMO. If this happens it will be because beef supply is drastically reduced. What could cause this? There would be huge incentives to raise cattle amidst such prices....
One thing to consider is that rental properties are a tax offset too. The reason they're not an investment is because they're non productive assets. They don't create additional value. But, they're appreciating assets with compounding cashflows which is better than most passive options.