if you know the AutoCAD, I am Sure you know, if you don't know, then learn as soon as possible.because without AutoCAD you cant imagine any Software which is designing related.AutoCAD is basic and everyone needs to know that.From Civil background to electrical, electronics, manufacturing division need to know.
a) You have imported the 2D file from AutoCAD to Revit.
b) Revit Not only given the architectural part is also given the Structural and MEP division.so you can use Revit as a structural and plumbing software also.
c) The easy using software among other 3D software in the market.AutoCAD 3D is good but no like Revit Architecture, the main Problem in AutoCAD 3D is, it has taken lots of time and the selection tools are very complex to use.
d) You can use this software as a Drafting Software, what you can use in AutoCAD, the plots, and lining, grid line, so you can find everything in Revit Architecture as well.and the best thing is you don't have to create the four side elevation one by one when you create the drawing for the floor plan the elevation takes smartly the side design for your other sides elevation design, but in AutoCAD, you need to take the construction lines to create the elevations.
e)You have a lots of libraries inbuild on it if you want to create yourself you can.
SO lots of advantages you could found the reason for using this.
3.Construction Site Works
Those who have been working for a Construction division, the main questions arise from this side.Those who r still working and your planning to be a manager or planning engineer or site engineer basically you want your career in these site work only then please don't waste your money on this software.
If you want to gain the knowledge lots of Youtube Videos and Blogs are waiting for you and help you.
Because as a Site Engineer you have to do work on the site and sometimes you may have to handle the AutoCAD 2D for Print Purpose or some changes on drawing softcopy, discussing with senior or design architect.
Start a Designing Consultancy
But yes if you are working in the field of construction and you want to do a design or having some plan to start any startup regarding the design software then please learn that software in which you have interest and yes it should be relevant designing software.
4.Wanted to be a Structural Engineers:
If You wanted to be a structural Engineer, then don't go for the Revit Architecture, but yes you may try the Revit Structure because the structural detailing is awesome and the using of this software is very easy.so anyone who wanted to be a structural detailer then please ago for Revit Structure.
So It mainly depends on your purpose, if you need this software as a profession then please go for this and your spent money never be wasted and if you need this as a learning purpose .then please go for the research and youtube videos and blogs and learn without any investment.
so I hope you people like this blogs.