What is the minimum amount of bitcoins a poor person should have? and the minimum time it should be Hold/retained?
There is no minimum amount of money to hold bitcoins, and not even for the poor person. Bitcoin only depends on how much money you can invest and how long you can hold it. Basically, when you invest in bitcoins it depends on you how long you hold one, and you get profit according to it. If you invest more money in bitcoins, you will definitely get more profit if you hold it in the future. And if you invest a small amount of money then you will definitely get a small profit accordingly. That's why you have to be patient for a long time to get the same amount of money you invest.