what if btc takes over €/$ ?
It won't happen, ever.
isn't this part of what people want?
No.
how do we justify some people hoarding thousands of btc for doing nothing?
People can do with their money whatever they want. It's not up to you or anyone else to tell them, what they're supposed to do and what not.
but would i want people to have hoarded thousands of these? they didn't work for them, just speculated and were there early. society just won't allow that.
How do you know what they did to get them? If they worked, speculated, got them as a gift, or found them on a hdd they got from ebay?
And why does it matter?
Society already allows speculators, doesn't it? There's lot's of people with big bank accounts that never worked in their life (did Paris Hilton ever work?) and society applauds and cheers at them as idols and throws even more money at them.