The stuff you are saying kind of makes no sense?
Crashes happen when folks enter a market to make money then the returns get lower then expected and they start selling along with a bunch of others that are selling also due to lower returns and then the crash. Do you know any folks getting into pinball to make money? Well why are they getting into pinball? For something fun to do whether it's playing, collecting, working on, modding, playing in tournaments or barcades and meeting a bunch of new friends along the way maybe?
Here is my take - Pinball recently got more popular and took a bump during the recession around 2008ish during a time when folks really valued and respected money more than ever in their lives and made really conscious buying decisions. It was a time when folks were worried about their house values, jobs, the stock market, savings and the future in general. They wanted something they could play in their home with friends and family and pinball provided them that fun and even some comfort. 10 or whatever years later the economy is better and chances are that the same folks who got into it Pinball over the last 10 years are doing a little better also, are more comfortable with their financial situations and have put more money into more expensive pins because they love pinball for one or many of the above reasons. The older school folks who came in before 2008 are folks who may have bought their AFM or TAF for $3000. They love their games and won't move them out the door anytime soon even if the market goes down. They bought pins bead use they loved them and had no worries about future values when they bought. These folks are the backbone of the hobby IMHO. Pinball has and will always be that little break and getaway from the real world for many whether you are a NIB stern buyer, an EM collector or a hipster playing in a barcade. If folks sell then what else are they going to do for the down time? Beanie Babies?
Now if folks stop playing that is when pinball may take a hit, but I just can't stop hitting the start button one more time.
Keep it simple - If you can't afford an $8000 MM then get a $1000 Firepower and just have fun like a bunch of us are having in the hobby.