Although the OP asked an interesting question, it is also very interesting to me that during the first 4 years as much as 50% of all Bitcoins were mined, and of that as much as 2.625 million in the first year.
Therefore, we can conclude that the first users were really privileged in some way, because not only could they mine with their personal computers, but they also had the opportunity to mine blocks with the highest rewards. It was, without any doubt, perhaps the most interesting time in the short history of Bitcoin, and the most fruitful period in someone's life if by any chance he saved the mined BTC for the future.
I learned from bitcointalk by senior members that if you want to take profit, take profit like 90% of what you have and reserve 10% for something you even don't imagine will happen. It is like a lottery ticket and no risk because you already take profit includes your initial capital.
So it's worth to make a bet with 10% rest for something that can change your life. If it won't happen, you won't lose anything. In contrast, if you take profit with 100% coins you have, you will no longer have a life-changing ticket.