Whereas with bitcoin (compared to real estate), you just buy it and
hodl it safely. It seems impossible to come up with more passive investments. Do you feel an advantage in choosing real estate investment over bitcoin? I will not ask the question of what you would prefer to invest in here, because it is already clear what the majority will choose.

Your analysis can be right or wrong based on certain considerations. The location of the property is important, as well as the conditions of the country at a particular time. In countries that are experiencing a population explosion, the price of houses can skyrocket, and a person can make a profit. A country in Africa is experiencing a boom in the real estate sector because crude oil and some precious stones have just been discovered. So it has led to the influx of foreign workers, which has also led to an increase in house demands.
But on average, I think holding Bitcoin for a long time will be better than investing in real estate. Both of them have both merits and demerits but I will prefer Bitcoin. Bitcoin is more convenient and more predictable for me.