Well the price fluctuation is a thing that even the expert trader can't predict accurately. The price might go up or down.
The fork has finished and the price has seen a little of downward movement but it is not that much though. We can consider it still a higher price.
If the price is corrected more then there might be a downward more if not we can the price rising further more. There is a fork in November and so there are chances that the price might increase until then. So you have to take your chances against the price.

I buy every month small amount no matter what price is

If you're planning on holding the coins long term, then get them now; difficulty is increasing and supply is increasing. When talking about short term though, maybe wait for more price dips before purchasing.

my relatives always tell me this Chinese proverb. "The best time to plant a tree was 20 years ago. The second best time is now." Let me tell you that this applies also to bitcoin. back when bitcoin was only a few dollars I already know about it. The thing is that I din't think that it will be a good investment and never bother with it and because of that I have lost a golden opportunity. So the lesson is that if you see a opportunity to invest go for it. Just remember always take caution when investing and never invest what you cannot afford to lose.

If you plan on holding bitcoin in the long run, then they are now; Difficulty is on the increase, and supply is getting harder When talking about short term though, it may wait for more prices to drop before buying so we should often monitor bitcoin prices if we invest in making a big profit.

to predict the rise or the price is very difficult, because the price can change without change we know and we used to, if it holds the money is me, I make sure to buy it right now, because if we expect the bitcoin price down did not happen then we will get far behind the price increase, and it will not hurt us to buy bitcoin if we intend to invest in the long term.

You should buy it somewhere in the future. If I were you I would buy after the 2x fork in November. The bitcoin may deep in price quite a bit, we may see it below $3000 or even lower. That is just my opinion, you should listen to yourself because I am not a financial advisor. But it makes sense to me that after 2x btc will drop just like after fork of bitcoin gold. Some people made more money by just selling their bitcoin at the top and buying back lower than on bitcoin gold.

Courage. You need it.
Faith. Most needed of all. Trust will also make it smoother and easier to decide.
Without those you wont take the risk.
But I suggest you do it as fast as you can. The price fluctuates like crazy and no one can tell you a 100 percent accurate answer. It is unknown. Just go for it if you made your choice.

I think you should do that cause the price of Bitcoin at this time only about 5k5$, it's a good price to buy cause I think after the hard fork Bitcoin price will reach to 7k$ very quickly. Beside you should buy it now to claim free BTG and Bitcoin2x after the upcoming hard fork. If you still feel a little bit nervous about it I think you should make some research about the coin market before decided to buy some.

solution for this problem is invest small amount of money per month in a period where prices are dips