Thanks for the welcome, you were the first to welcome me.
I also thank you for your advice and your directions.
In this regard, if it is a chance to make money over time, why retail traders do not start to adopt Bitcoin? What blocks them? Is it a lack of trust and security towards the Bitcoin itself?
Unfortunately the problem is more complex than that. This is true that media throughout the world try to discredit bitcoin as having no official government support, but to the people well informed it would be just FUD. So lack of trust is not the reason behind low acceptance.
The problem is that the fees for spending Bitcoin are very high. You will buy a coffee for 2$ and spend 20-30$ on fees. Some merchants and services (Steam is the most notable) that previously accepted bitcoin - stopped doing it. I have read in some other thread by German user, that Berlin was full of places that accepted bitcoin and it is no longer the case now.
The only hope is the Lightning Network, which may create channels to spend bitcoin with no fee. How this will play out - we shall see in the future