Let\'s start with the story of pizza boy. I am pretty sure that you are know situation when developer form Florida supply 10000 of his Bitcoin for two pizzas. He asked at Bitcointalk is someone want that number of Bitcoins in the exchange of paying pizzas. Some guy from the UK accepted this offer and order two pizzas for developer\'s name, paid 25 dollars and got 10000 Bitcoins. In the time of happening Bitcoin this number of Bitcoins worth around $30, think about how much is the amount of Bitcoins is worth today. That was the mentality of the Bitcoins in the past, and people such as this developer and many others couldn\'t know the future of cryptocurrency.
For example we can\'t be sure that the guy from UK who bought 10000 Bitcoins for $30 is multimillionaire today. It is pretty simple explanation why the guy from UK is not multimillionaire today. Let\'s explain. He bought decent number of Bitcoins for $30 and for the simplicity of the example, let\'s say that Bitcoin suddenly peaked at over $1100. Our guy is for sure amazed by the price rice of the Bitcoin, and it is a great opportunity for him to cash out now and became a millionaire. Or the other way, he can just ignore this rise and wait for other price rise of Bitcoin. But it is not happening, opposite thing happen, the price suddenly fall for about $500, I can assure you that many people in this situation would cash out their Bitcoins, because they are not sure what kind of future for Bitcoin is coming, their are afraid for their stakes.
But of course there are few entities that could predicted how will Bitcoin\'s price grow. This people can be big insiders, people from the banking industry, different ventures, exchanges, etc. One thing is sure, only kind of people that could be Millionaires today are the people who had not sold any coin, either the price go up suddenly, either the price is falling down.