Does he exist in real-life form today?

All depends on your own beliefs system.

Does he exist in real-life form today?

Of course he doesn't exist in life form today.

The greatest trick he performed was to convince the world he doesn't exist.

It is up to you to interpret your world, according to your beliefs and faith, and decide. He could be out there... it could all be a tale told to kids so that they go to bed on time.

I firmly believe I know exactly where he lives... others however won't agree with me.

Smoothy, the White House?

Different belief systems see the Devil in different ways. Personally I do believe that there is a literal Devil and that he does exist in spirit form.

Ha, ha... I wanted to leave that part to the imagination in this forum. :-)

I also believe in the other one... of the Christian faith. Evil, pure evil most certainly does exist, and manifests itself in many ways.

Lucifer? the deceiver? Devil the deceiver!!

There is much evil in this world. Is there some individual being responsible for all of it? Possibly. Is he male with crimson skin and a tail? Doubtful.

"real life form" is a rather tricky description. I think the OP is referring to an actual corporal being. As with other angelic and demonic beings, I believe the Devil can be both corporal and spiritual. I believe he does have a unique form, though scripture makes it clear he and his angels can change their appearance.

I don't think we should equate Lucifer with the devil. Lucifer was cast from heaven. But he is still an angel, although a fallen one. No, the devil was invented by the church to meet their own needs.

Lucifer's only sin was vanity; his name means 'bringer of light'.