We all know that involving in bitcoin it takes your time and also money.Is it worthy to risk your time and money because of bitcoin?
It is all about taking chances and choices,no one is forcing anyone to do anything,if you find it interesting and you have the money to take some calculated risk ,it is worth the time you spend.for me bitcoin is a business, we all know all business have a risk and I think it is normal if a business takes your time, because it's also can make a profit for yours. since I join on crypto world 3 years ago and make a profit till now, so i think it is worthy if I spend my time on bitcoin.
I would rather call it an investment rather than a business. 
As long as you do not provide any service you cannot call yourself a bitcoin businessman. 
The answer to this question depends on one's knowledge and understanding of blockchain technology behind it. And most importantly like what others say: You need to base it on your risk appetite. As simple as that.
You really do not need to have a deep understand about blockchain technology to be an investor but you must be aware about the market movement of bitcoin to make profit.