What I'm most worried about is the introduction of quantum computers. When quantum computers are born, the digging of coins is terrible. Minners will go bankrupt because all the coins that they can dig can be exploited. There will be no need for Minner anymore. They will sell out their equipment. It's Terrible.

Don't worry, mining is going to be your smallest problem. As soon as somebody put together even 1k qbit unit traditional cryptography as we all know it is dead - and so does the world as we know it. Think about it: Internet commerce is gone, secure communication is gone, financial system is back on dedicated dial-up lines. You can't pay with a credit card anymore, you can't trade unless you're physically on the Wall St. Welcome back to the 70s, man.

Can anyone show us the technical design of an ASIC appropriate for Equihash/Ethash?

The memory requirement for the current GPU mining is simply too much for today's ASICs miners.  But the ASIC being ASICs, the design should be able to utilize off-chip memory.  The design investment would be a greater bottle neck than the current technology.

I wouldn't think it would happen in 2018.

Actually, yes we are. One thing that keeps traditional cryptography alive (we're still talking about asymmetric schemes based on large number factorization, correct?) is the fact that the largest quantum unit today (that we know of) is 50 qubits. Make it 5,000 and your SSL session can be decoded in seconds, no matter how good your entropy source is. EC-based is a little bit tougher but not by far.
One technology is there you'll need quantum devices to secure your information. But we're talking about decades timeframe, cryptocurrencies will be long dead by then.

I will really be hard to judge that GPU mining will be done any time soon as of now GPU prices shot up two to three times its worth that is just means that GPU mining will still be in the market. As of now it creates confusion and frustration specially to the one that buys hardware either for mining or gaming community because of these price hikes.

Why don't you just mine BURST? It is ASIC-proof. PoC is a unique way to mine which can't be replaced by ASICs. Also HDDs spend a lot less electricity and setting them up is fairly easy.

you can't keep with new algo each time they release a new coin, asic development are not that fast for new algo, by the time you make it, there will be a new algo etc...

You mean the Crytocurrency market will collapse. I do not think about it. I only fear for the minner will be threatened interests. The birth of quantum computers will be the purification of the market.

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Don't worry, mining is going to be your smallest problem. As soon as somebody put together even 1k qbit unit traditional cryptography as we all know it is dead - and so does the world as we know it. Think about it: Internet commerce is gone, secure communication is gone, financial system is back on dedicated dial-up lines. You can't pay with a credit card anymore, you can't trade unless you're physically on the Wall St. Welcome back to the 70s, man.
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I'm not referring to the usefulness of technology. Blockchain technology is limitless. Take a look at Blockchain's application. Great.

It's funny, people are paying $800 for a rx 580 and they think gpu mining will not die hehe, Yes it will not die cause it's already dead hehe.