I think its a terrible idea. bitcoins are a made up currency and PO points are a made up currency. You're just replacing one fake currency with another. Atleast PO points come with the brand name you've developed here. Dislike.
if you put it that way... the USD is actually fake currency.. backed simply by an idea.. just like PO and BTC...
"Success is a science; if you have the conditions, you will get the results" -Oscar Wilde