So is it profitable for hackers and how much easy it is generate such vanity address?
Not even hard. 1Musk has a difficulty of 4553521 on vanitysearch. I've generated about 11 in the span of 3 seconds. In addition, 1ELonMusk takes roughly a day or two on my single 1080TI.
And its cannot be done by a single individual because it's require much processing power and other things.So what are your thoughts on this?
It can definitely be done by an indivdiual. Processing power has gotten so much faster, that wiki is obviously outdated.