The reward scales with risk taken. Early adopters always have more risk, hence it makes sense they get more reward. Just look at all the ICO participantshigh risk as many of them don't last, but if one becomes a major player then they get an outsized reward for that risk.
The early adopters of the bitcoins are getting advantage form it at ah higher scale than those who had recently adopted the use of this digital asset. This is because they have passed through a lot many phases of high risk and hence they are the ones who deserve to get the most out of it.
All one needs to get to this level is nothing but a constant belief if the use of cryptocurrencies and do not let them be sold in the time of. This gradual prices eventually lead to the success of a person in the long run but wait and patience are the basic factors behind success through this method.