What he meant is maybe you took PR of blogspot as yours......you got a blog on blogspot? Use the SEOQuake plugin of Firefox to check the PR.
What ever tool you are using is showing blogger.com PR as yours, that happens when you switch a browser window or use the go back history... as I'm writing this, this page shows a PR of 10 lol, because I was recently on google.
Really people..LOL Act like people with repute beyond repute ->_<. Anyway depends on backlinks I guess, I would say PR6 and PR7 can easily drop but a PR8 and higher are very difficult to drop because they have their own authority.. Larry will inspect personally to determine if a website of PR8 needs to be dropped, thats what you call pr8. So most probably your domain is certainly not PR8. I have waited for forever for my PR7 and here you come asking what to do with PR8 so thats perhaps very impossible. Trust me..
I suspect it coming it within a month or maybe a half more and this duration is not enough to work accordingly so as to maintain the PR [In my opinion]. Nah! No Google contact as of now but who knows.......maybe in future And you cannot be so sure regarding the drop from PR8 to PR7/6. Everything is decided by Google - You can only make estimates
The recommendation that I would make about making money would be selling Text Links, you'll make a nice amount from at least selling like 5 each month. Good luck with that.