As at now, people who earlier believed in bitcoin and invested heavily into it wished they bought more than they bought, having seen how bitcoin has brought them fortune and given them financial liberty. Bitcoin has increased in value tremendously over the years and it is certain to continue to increase. This is why you need to have bitcoin.
Even if they did, that does not mean they would be able to change the hands of time. However, back then, it was easy for anyone to buy what they can afford to lose since it is just new with a lot of development and soft forks just to get a better result and a very little value.
However, the reason why this was in place like that was because a lot of people back then believed in its future and not just seeing it as a means to get rich even if that is just one of its side benefits. If those who are getting in now can see the same thing those early adopters saw years ago, they will understand the need to buy the dips and hold.