"When you are born into this world all pieces of land are already owned by someone else." The answer is you will get a job and earn some bitcoin and buy it from somebody who wishes to sell it. You may inherit it as well. There is nothing wrong with inherited wealth. I don't fret that men like BIll Gates and Warren Buffet have loads of money. They have made our lives infinitely better through their innovations and skill. Their massive wealth was well earned and I admire them for it. But wait a few generations and see how much wealth the heirs of Bill Gates will have. I predict very little. It will get spread out through the population because few men create that kind of wealth and even fewer can keep it. Have many Kennedys and Rockefellers have the same power and money their ancestors had? None that I know of.
Sadly it doesn't work out that way, it would be great if it would. But the rich are usually getting richer or at least stay rich. They have the wealth to give their children good education, they have the connections to lead them to a good job. Most of the poor never have a real chance no matter how hard they try.
Of course there are execptions where someone makes it from zero to hero or falls down from wealth, but it isn't the norm.
man's natural rights
There are no natural rights, only rights we make up ourselves as humanity.