Ok, so the question about paypal remains..what's the benefit for you? They're just a payment processing company. Or are you talking about eBay?
I also just found this thread on using Paypal, https://bitcointalksearch.org/topic/offering-paypal-for-bitcoin-youre-likely-to-be-labeled-a-scammer-read-why-164254, and it's mostly reasons to be cautious.
The thread is old though. Paypal may still prohibit the exchange of currencies.
I don't understand your question. I am earning bitcoins online and the benefit would be to liquidate the bitcoins for real cash then deposit the cash into my bank account which I have connected to my pay pal account. Bitcoin is just crypto, its not real money.