That's true holding your bitcoin today is one easy way to earn money with it. That is effort less and no risk at all.
What you need to do is just wait for the halving look for the price increase and sell if that price is right for you.
Holding is really good at a moment but we also need to put some efforts in growing our bitcoins and if we successfully do it then we can expect higher and additional profits in future.
Yes holding is really one of the best way to earn money with bitcoin as it is proven by bitcoin enthusiast and people who became rich with bitcoin.
It is the easiest and safest way of getting earnings to it.
You just need to wait for the price to go up and after getting up you are going to sell.
When it comes to holding you really need to be very smart as you should know what is the best time to sell, and if you sell at right time then you can earn good profits from it.