Many Early adopters still have BTC in their bitcoin wallet and they are rich now but the problem with all of them is that either they never stored anything or the machine is not with them or they forget the password of their wallet. Although they are trying every possible step to make it possible to get their coins back it looks impossible as of now.
Are you sure that many of early adopters still have BTC? Because as said in previous DannyHamilton posts, many of these early Bitcoin users sold their BTC on the first more meaningful price increase. Some sold for few dollars, more patiently people sold it for few hundreds and only small part of early users is still hodling.