Bitcoin is a good investment now because its price just keeps going up. In fact bitcoin is the best investment in my opinion. The early adapters are lucky to have bought at a very cheap price, but it's still very profitable today compared to other investments.
This trend will continue as long as bitcoin will be having a stable price. But as per the mining estimation, it may require another hundred years to get a stable price. An investment without price appreciations will not be attractive nor good in common sense. So, bitcoin is a good investment now and till it gets a stable prices.
what you should know about early adopters is that we are still in that stage and all of us who have bought and are holding bitcoin are still early adopters and there is not much difference between us now and them in 2009. the same way we can not see the future they couldn't either. you see the potential only and speculate based on that.