I call ******** on a lot of posts on this thread.
Flatsharing aged 30, with a 40k salary and a not too frugal lifestyle but 100k in savings? Assuming you save 1k per month that would take 8 years of saving, and its highly unlikely you would have been on the same salary at 22. Someone else is 22 but has 35 grand in savings? I'm highly sceptical that the amounts mentioned on this thread can be saved out of ones own pocket at such a young age. I suspect that a lot of these amounts are partly saved, and partly financed by inheritance, family trusts and the bank of mum and dad.
Even so I'd put many of the people on this thread in the top 5% of earners at their age. If even they are not buying, then god help the rest of the populace. A severe crash can only be round the corner.