what is your consideration to say like that?
I think your prediction is different from me, remember that I'm sure bitcoin will rise in early 2018, spreading and volume increases, big investors increase. and a good bitcoin system will occur in 2018.

If nobody knows about it then its gone. Might be good to leave it as part of a will.

Coins which are in wallets for which private keys are not known, will be permanently lost. 

Most probably he will take it to his grave and the btc he has will be gone with him as well not unless a great hacker could hack his wallet address. It will stay where he has it secured and if he has not told anyone about it then yes it is considered dead too.

hahahaha

good joke, you knew that in the earliest times there were cultures that where when someone died, they buried this person with their belongings.

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This is a very serious concern. When someone dies it becomes something very problematic because besides the lack that this person gives us we have to deal with the goods that this person who died left. the banks take a lot of time to give the insurance values and there are more others bureaucracies involved. If you want someone to benefit from your bitcoin after your death, this person needs to know that you have bitcoin, your password and private keys. But you do it this movement (tell someone that you have X bitcoin, give your password, give your private key) you are at risk of being robbed. Unfortunately in today's world even the person you love the most in the world can fool and steal you. So the question you should have is:

when is someone trustworthy enough to give pasword and private keys?

Yes indeed. I completly agree with you. If we give a private key to somebody that love most. They also can be stolen btc

well, if you have a nominee it works, otherwise if banks "really wants" to find somebody to send the money in the account it's a long process and is not free.
happened to a friend of mine when his dad died, there was no nominee and even though he demonstrated to be his son, the account was locked for ages, he needed a lawyer to be able to unlock the fonds in it.
That's at least what can happen in my home country.

he was talking about some greedy person who could farm that much and not share with family ( I can kinda relate to this story but nwm) anyway I wrote in previous post a idea about its distribution.

if you don't own 100BTC yourself then you don't need to worry about those who do have that much. because someone who owns $1,600,000-$1,700,000 with the potential to be worth $2 mil, will surely know what to do with it and has made the arrangements already. unless they are ignorant of their family or if they think they have bitcoin nodes in afterlife too