Who is that one man that you are talking about though? Well, if you had bought bitcoin when it was around 1$, you are definitely rich by now. Also, there's nothing wrong with people wishing what they could've done in the past, it's called hindsight.
When you bought btc for 1 dollar, can you stick to it until now? When buying for 1 dollar, would you feel that 10 times the profit is enough, and sell at 10 dollars?