bitcoin is not at all evil. it doesn't have any brain and so i could say that bitcoin is not a eveil not a good one but its the way how we use the currency. if we use bitcoin for good cause then its fine otherwise if we use bitcoin for bad then that's our problem not bitcoin's.
Bitcoin is a currency and paypal is a service. Using bitcoin is easier and hassle free as compare to paypal. Those who know about bitcoins are now switching to bitcoins as they know that paypal sucks and ask too much fee for their service. Bitcoin will soon overcome Paypal and other such services.