The reason why people think real estate is the best investment are because of two reasons:
1. They can rent their real estate to earn passive income.
2. The real estate (land and buildings) price will increase every year.
It means they will earn realized profit and unrealized profit by investing in real estate.
But they forget if not all renters want to rent their real estate, not all renters have good manner, they need to pay renovation bills, they need to pay tax, etc etc.
While investing Bitcoin, it's completely stress free since you're the one who can control your coins.
Real estate is a profitable earning opportunity and many people are preferring real estate because it gives them monthly income like that of a regular job while Bitcoin can give you profit but not on Monthly basis so if you hold it for years then you will be profitable otherwise your profit will not be regular like that of real estate.
Price of both Bitcoin and real estate increases as the time passes but it is necessary to be noted that in case of real estate you have to wait for another person to allow you rent or money for your building or space but in case of Bitcoin you are free to decide about its holding or selling and will not be dependent on another person for profit or income.