I hope it is completely different question because bitcoin is a currency and paypal is a payment system which is handling many other currencies also, Even though both are completely digital currency but it is completely different concept. Paypal is one of the best payment processor or payment gateway which is paying it's customers on time. Where as bitcoin is completely different it is not governed to single person any has the right who has his own coins.

Yes,I usually disappointed in trading,because I'm scared and not decision immediately.I think i should improve it

I could really say that  people are different in any way regarding  in to a thing  like  porn there  are people would really subscribe  up for this even they  would   pay  money into it. Bitcoin payments are great  regarding  on anonymity  if you dont  like  to compromise  your   identity.