BTC is suffering something very strange. I mean, can someone explain, please, what is going on with the price that stuck between 450-500 USD; is ithis normal or is jut me making a scene?
Btc is not "suffering", it's not strange, nothing is wrong and you
are making a scene

The hodl propaganda says every year the price will at least double and we are going nowhere but to the moon and to conquer the world.
Don't blame him or others if they feel shoked when the reality makes things seems different. Some people sell too optimistic expectations, and some people buy them.
Honestly, Just hold. Seriously, just hold. And then when the price changes, just hold. The simplest argument is this:
1. Do you believe that the USD/EUR/Rubles/Yuan etc will be printed/created by their respective central banks at will? If yes, evaluate #2
2. When supply greatly increases, do you believe value/price decreases? If you believe yes, then evaluate #3
3. Do you believe that Bitcoin has a fixed supply? If yes go to #4
4. THEN the USD/EUR/Rubles/Yuan will all decrease in value compared to bitcoins and thus the amount of USD/EUR/Rubles/Yuan etc to purchase a bitcoin will INCREASE (bitcoin price will go up)
Obviously there are more perspectives that need to be looked at, and you have to include the possibility of the world banning bitcoin or the internet being taken offline etc etc. But overall if you stick with AVERAGES and no radical changes, bitcoin price should always increase when being compared to a fiat currency that is printed without limits.
That's false, there is a big expense in Bitcoin, that is the PoW mining network. Every year, about $300m-500m are transferred from the Bitcoin eco-system to the hardware vendors/electric companies. If there is no inflow of capital into the Bitcoin eco-system, then Bitcoin will lose value much faster than USD/EUR/JPY etc...
So far, Bitcoin has been lucky, as multiple catalysts has driven huge amount of capital into the eco-system, making the mining cost negligible. But this year, the inflow has slowed down significantly, while mining cost has only went up, therefore we are seeing the price slowly erode, because mining cost is slightly outpacing capital inflow. We will need another catalyst to drive the price up again, and the only two possibly catalyst I see are Bitcoin ETF and the next halving.