5. Most Bitcoins will be concentrated in the hands of countries, large companies, financial institutions and wealthy people for value preservation and transactions. The degree of concentration exceeds that of gold, so that few people can own a complete Bitcoin. Early Bitcoin investors can deposit Bitcoin in reputable financial institutions to obtain stable returns.
That is concerning, because it means Bitcoin is going to become centralized in few hands of powerful individuals and groups of power. Bitcoin was supposed to become splitted among the hands of many different adopters. Anyway, things never work as firstly expected, so regards the possibility of depositing funds in reputable financial institutions to earn stable passive income from, it was be analyzed very carefully, because such institutions are the main source of scams and funds seizure for the government.
If you want to keep yours coins safe from everyone, you have to store them inside a hardware wallet which only you have access to.