Are you familiar with the phrase "past performance does not guarantee future return"? The important word here is "guarantee". The observation that Bitcoin did well in the past does not serve as a reasonable argument for why it will continue to increase in value in the future.
It looks like you missed the point. When i found bitcoins 2 years ago it looked to me like all was done already. It looked to me the same way like you look on it today.
Of course there is NO guarantee that it goes forward the same way. So if you believe that the current status is the end of the line then its ok to me.