Those who acquired bitcoin in early days got larger share in less price. Later when there are very less bitcoins left to be mined and prices are astronomically high, it will be hard to acquire even fractions of bitcoins. Where is equality concept associated with bitcoin then ?
They acquired Bitcoin at a lower price because they believed in its potential when few people were interested in investing. The massive profits these early adopters are making today are a result of their belief in Bitcoin's potential, allowing them to hold so many Bitcoins at a lower price. You don't need to say that's unfair, as they earned the rewards of their own efforts.
What you're doing now shouldn't be about envying these early adopters, but rather about motivating yourself to accumulate more when you have the opportunity to do so while the Bitcoin price is at this point. If the Bitcoin price increases one- or two-fold in the next few years, you could also benefit significantly from it.