It is not about risks but about patience. I have not taken such photos but I think you have to take several photos over a period of time and then merge them into one. You probably need a stand to keep the camera in the same position. This stuff is for photography lovers as most people do not have time or motivation to do these things.
Money can buy camera only.
You need time to learn skills and only then passion works to motivate you to move ahead.
Most of us buy Camera....
And then, Reality strikes !
Married Life has own demands.....
LOL !
Now,
You can't spend time on such things.
People who do all this need extra time and can get desired skill also then in practice, it takes few or more years to stand out from rest of the here moving in same directions.
There are many thing behind all this in practical life. Can't sum up 8n a short paragraph.