'offered' them?
I suspect most of us were in a position to buy or mine at some point. With a bit of effort anyone around could have mined 100's. I thought it was just a fad so never got involved.
There you go.
Yes a person could become millionaire by investing into bitcoin, those were wise who invested in bitcoin at that time when its price was very low, now they are millionaires and billionaires today. So now if you are getting a chance to buy more bitcoins then go for it and invest it so to earn more and secure your future