Lets say I want to buy bitcoins today and store them for 20 years to use a my retirement fund. Live comfortably, but don't need to buy a yacht or anything. How many do you think I would need to buy?
It actually depends on how much Bitcoin you want to retire with because not everybody is going to retire with the same amount of Bitcoin.
Some people want more Bitcoin and some people are already happy with a couple of them it depends on the person and what the value is.
If there are more than 10 million people retire with the same amount of bitcoin, you only need 2 bitcoin.
Well you don't know what is going to be the value of bitcoin after 20 years. And I don't think that is going to secure your retirement.
Because for me 2 bitcoins is going to be small amount for retirement it is better if you are going to make it 100 bitcoins so that whatever is going to be the price.
Then you are going to be covered by your savings.
It depends on the price of the bitcoin, if the bitcoin price rise 40% a year, in 20 years, the price will be $600,000 each.