I am someone who is waiting. We moved to a new area last year as renters with a large deposit from an inheritance, with the intention of trying to buy straight away. However prices started to fall almost immediately, at which point I started to make more of an effort to understand the housing market and that has convinced me to hold out a bit longer, albeit monitoring the local market very carefully.
From what I understand, the market has been propped up in the last 20 years firstly by lax lending and then by extremely low interest rates and then tax breaks. The lax lending has now been regulated away, and the low interest rates can't happen because of inflation. If interest rates go right down again it will be because of a recession which will also hit house prices. The tax breaks can't happen because the government can't afford it any more.
I am not saying that there definitely will be a crash - it's obviously very hard to predict - but I am yet to hear a compelling argument that there won't. For example I keep seeing people claim that house prices only go up (in the longer term). This is clearly false. They went down consistently from the late 19th century to the mid 20th, for 70 years. The argument that there can't be a crash because "supply and demand" is also wrong. This should be obvious really - the housing market is very volatile whilst housing stock and population size changes very slowly. And demand does not equal the number of people who want houses, it's (also) determined by real wage growth and the availability of credit. Credit is now greatly reduced, and if we have a recession (quite plausible) then wages will inevitably be hit too.
I would prefer to buy than to rent. However in the last year we have gained money by renting - the houses we are interested have fallen in price by much more than our rent and we are now earning good interest on our deposit. The gains of waiting have been equivalent to a modest annual salary, so not trivial at all.
I've been monitoring the proportion of houses on Rightmove in my area that are unsold Vs sold, and in the last year this has more than doubled. I've also started monitoring the proportion of reduced houses and this has increased by 20% in three months. When these figures start to flatten out significantly (i.e. for a good few months consistently) I'll consider buying. I suspect this will be more than a year away, which is frustrating because I actually would like to get on with buying, but I genuinely can't justify it, financially, at the moment.