This isn't a scam. If I give everyone in the comments $100k, by "next year" some will have $1m and some $0 -- and, in general, we'll all be a little better off.
Its the nature of any advantage that it compounds, and compounding advantages of any kind produce dramatic inequalities (of sex, money, creative achievement, etc.).
Bitcoin isnt a scam because it produces an unequal outcome -- any system which works to increase the general welfare will necessarily operate on and compound inequalities.
It's a scam because as time passes the general welfare *does not increase*, indeed, it plummets!
People holding coins arent opening factories, building houses, teaching people, etc. Nothing is happening. They're litterally just twiddling their thumbs.
What's actually happening is that poorer fools are joining late in the game, whose money comes from actual labour... and supply the initial parasitical early-stakes with exit-cash. Ie., they wait for 10yr do nothing; you work for 1mo and do lots. Your productive labour becomes their exit. It's welfare for the rich.
Inequality isnt the issue here. It's the particular type of "theft" taking place. It is, in a very real sense, an actual scam.