The current bitcoin trend is very good, so anyone should believe to invest in bitcoin.
but it's easy if you invest in the real world, or open a business I think is better.
The trend will always be up that is for sure. Of course no road for such a big increase without any price decrease but the finish line is always at top. And yes I agree we can invest in reality too or doing such business while at the same time you have an active investment in bitcoin. You really have a reason to believe in bitcoin.
Of course, do not doubt bitcoin because it is already tested through times, if you look at the current value today, you will be amazed know that it started with no value.
Now, if you are convince with my statement then you should invest on it as it was expected that the value will rise after the halving. But remember only invest what you can afford to lose cause we never know.