How can you say that most of us can accumulate whole one bitcoin or you must be very rich to predict this.
I think majority of the people can't even afford to buy 0.1 BTC at once or maybe they have to sell their properties or any precious item like gold or diamonds to buy bitcoin. I know people who retire but their life savings aren't worth even one bitcoin. Unless we have a bear market and bitcoin price is below 50k, only then more people can buy and accumulate bitcoin.
The truth remains that majority of us here cannot afford to buy one bitcoin at a single purchase, but achieving the goal of having one bitcoin is never impossible if we put our mind towards it and keep buying consistently. If we have a steady source of income, we can set a target of having one or more bitcoin in the next 10 years or more. If you see something as impossible it will remain out of your reach. But once you set your mind towards it you can achieve it. It will only take time but it can be achievable.
It's also very important not to think about selling your Bitcoins unless you have gathered your targeted number of Bitcoins.
So if we have gathered our targeted numbers of bitcoin, we should start selling it and go back to the scratch is that what you are telling me? Well if that's your strategy all along you are wrong. If you have managed to accumulate your targeted numbers of bitcoin, why not lock it away and hold it for life? I am not in support of selling your bitcoin even if you have accumulated to your desired numbers. Why sell immediately after getting to your targeted numbers? Do you know were bitcoin will be 50 years from the day you completed your targeted numbers?