Sales are sorted by gTLD and ccTLD, length of domain, average and median prices.
Top 10 sales listed, including Gambling.com for $2.5 million. (Safe be in registering that domain.)
Interesting and quick read.
Per Sedo's "Company Overview" page Sedo has >15 million domains in its database. 39,951 sales would amount to ~.26% sales rate, an indication that 99.74% of domains speculatively registered didn't sell in the aftermarket. Ergo, methinks there are a few people and even fewer business entities profiting whereas more speculators are not. It's a bit like Las Vegas. They don't build all those grand casinos by virtue of there being more winners than losers.
Step right up and buy your lottery ticket. You never know . . . what you ignore (which is the odds of winning).