One of those successful cases of bitcoin hodling was a friend of a friend. They (a couple) took an important risk by investing 60k of a dismissal compensation into bitcoin and making a x100 on it before selling half. I do not know what they did with the rest. Now, these people were not rich, they took an enormous risk compared to their total wealth. They had to really believe on the project and pass though some of bitcoins usual "tests of faith".
For someone with let´s say, a net worth of 1M USD or more plus house, hodling 60k until they became 6M would have been not that much of an stress. Do you think it was easier to benefit economically from bitcoin if you were already a bit up in the ladder?
Sure i do believe if you are rich you are okay to invest in certain ammoun of money and it will look bigger for most people but it might be just not to much for them. The best advice to invest for long term is always invest ammount of money that you willingly to lose. I do invest and hold almost 4 years and it does make me stress but still i able to manage to hold them and have a big profit from it. Sometimes its depends on how people think and how they able to manage their financially to be able to hold that long.