Thanks for reading my post. In your comment, I can see you are already kind of expert or advanced user. I share the same view with you that it takes a long time for delegation return. Delegation makes sense only for people who don't have time to take care of their SP. Instead of leaving the SP idle, it just better to earn "some" return in the long run. It is still better than saving in fiat which subject to inflation and various bank charges.
RE: How much you can earn by delegation of SP - steemit in a minute #41