Man earns to manage his life and family well. Like we earn not only to keep investing bitcoins but we also earn to live happily with our family and wife, children. In this case we will never hold the bitcoins but we will meet our needs by selling bitcoins according to our needs. So everyone wants to live a nice life, so everyone sells more or less bitcoins and no one will ever hold bitcoins for life and never will.
There are many ways to approach this, you would ideally want to keep spending more on the fiat side compared to the bitcoin side, that includes converting the crypto to fiat too. Because of the possibility of bitcoin becoming huge in price as days go on, you have to limit the amount you put in to bitcoin every month. So you have enough fiat to spend if need arises but would rarely if ever have to touch your bitcoin.
That is enough to lead a happy family while your bitcoins keep growing in their number. Nobody holds their bitcoin for ever, they always need to sell at some point, and they do.