Holding BTC for long tine is a good way to make money.
I could say that my first BTC when it was 300 usd and I bought quite a lots when it was 600 usd. I still keep buying and it is very good now.
So I could really say that keeping it makes money.
I am looking for more now.
It is always a good way to make money if you are going to hold bitcoin for a long time.
As you wish, you keep on buying some the best thing to do is to hold your bitcoin and good thing that you are aware and keeps on buying.
I have enough bitcoin just for holding and I don't want to spend it or cash it out.
If bitcoin is an pure form of investment for you then its better to hold them for a long term without spending them at a moment as it will take away from you an opportunity of making higher profits so the best choice would be to keep on collecting bitcoins at regular intervals and keep them safe in wallet to make higher profits by selling them when the right time comes.