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Being quite sarcastic with the topic name, but this is what I constantly hear since 2017 when I first got into mining. Just remembered it again today when my finance calculator told me I've reached the ROI for one of 2 3080 cards I bought in mid-March for $2200 each. This brought a huge smile to my face  ;D

This is possible if you have not been selling your coins all this time. If the price of Ethereum rises by another 10-20%, then you will quickly recoup the second video card. Block fees have grown a bit again

You're right, I wasn't selling any except to cover electricity bill for the entire household. I've noticed increased block fees today too, a pleasant surprise :)

It may be this July  2020 to May 2021 run matches

April 2016 to March 2017



That would mean we could have good times until Dec 2021 - Feb 2022

If that happens I will be very happy.

me too  ;D ;D ;D

Lol, I've sold most of my graphic cards at good price after making hundreds of dollars from each one, very happy with my strategy but now I feel like I'm missing out, waiting for bear market to buy more cards at cheaper rate

In just one month and two weeks? That's impossible 😂😂😂😂 you will need to give me the math before I can believe that, or are you talking about march 2020? 2200$ per RTX3080 seem lik this year to me, pls explain yourself OP 🤣

Yeah you may have left too soon.  You may find the cards will go up in price.


https://wccftech.com/galax-launches-geforce-rtx-3080-rtx-3070-lhr-lite-hash-rate-graphics-cards-to-combat-cryptocurrency-mining

if all cards come out as LHR soon then the older 3080 ,3070 will be god like.

I`m just little sad, that i didnt spend more cash for 3080.
Now it gets hot...heat kills my hashrate on somme gpu`s
Thats why i`m a little sad :D

I`ve planed to do it in february...if i do it, i would be verry sad now.

this is not a financial advice.

 but the previous cycle showed that you can still ROI 1 year from the peak of the bull run (more like the first year of bear market). of course it depends on "your circumstances/situation".

Yeah the 1080tis I purchased in feb 2018 still were making profits each and every month I owned them until I sold them in fall 2020.

so they made money for 29 months in a row. and the buyers also made money with them from dec 2020 to may 2021.

so they have made money for 37 months in a row.

but some months they made only 15 profit for the whole month.

other months they made profit over 300 a month.

A lot depends if you have a power deal.

I have a 1 card alienware 3070 rig.
it burns 180 watts on the kwatt meter. that is 4.5 kwatts a day.

at 5 cent power it comes to  23 cents a day to run it.

the card could do 60 mh say mh drops from 13 cents to 1 cent that comes to 60 cents so 60-23 = 37 cents.

in a real long time it would make a profit and pay off. if we drop to 37 cents roi is 3500 days.

Well if I recall when ETH peaked in Jan 2018, it was still profitable mining it all the way until Nov 2018, but from there on, unless you got very cheap power it just wasn't worth it. It would of been better to buy it instead of mining it. So it was almost a year ~10 months.

With 2014 peak however it was different. Everything topped in Nov 2013 however the profits quickly were evaporating especially if you were mining with GPUs. I remember with a R9 280X, you made like $10/day in Jan 2014, then $5/day in Feb, $2.50,$1.25,etc,etc. It got quickly unprofitable sometime in May-June. Mostly due to the fact that each GPU used like 300 Watts instead of 100 Watts like today.

Always in haste, that's what people do when they buy cards for mining, they don't have the waiting patience through and through, if you have cheap electricity or solar I don't see any reason why you should sell your GPU even in bear market and now that crypto is more popular I doubt that mining will be less profitable like what we saw in 2018

This is the time when scrypt was ASIC'd and then monero with cryptonight algo continued profitability for quite a while and some shitcoins along the way before ethereum comes to save the day.

yep 👍 five cent power with gpus pretty much makes money all the time.

I used to listen to that saying quite a lot and almost started believing it.Fortunately I started again on 16 March 2021 with Rx 6800 XT cards and Rx 5700 XT and so far I have made 2000 USD by mining so the way it is going is great,I think Ethereum may hit 50000 USD in March 2022 and I am not selling anything until then.

Where is metroid ?

Well he said he held 20% of his eth.  I wonder what point he will sell some of it.

4130 usd is quite high price for it.

$.1534 a mh

my 3080's are doing around 14-16 a day

Lurking hehe


I'm planning to sell close to 4.6 ~ 5k which is what i said would be the top, trolls are waiting it to go to 10k but I believe 10k eth is a huge bulltrap, I will be happy with anything close to 5k, I believe eth will go higher because btc is not yet its top which I believe will be 79k. What I will do is, as soon as eth go higher than 4600 usd, i will do a stop limit order at 4600 usd, then if it crashes it will hit my sell order, if not then i will see where it will go then decide if i will increase the limit stop order aka stop loss.

Are you planning to ladder out (i.e. cost average out) or sell all in one go?

I'm also interested to hear from others who have been mining/saving their ETH since 2018. How are you guys planning to sell? Laddered? One shot?

I sold 80% when eth hit 1.5k, kept 20% to sell close to 5k, I mean even though I was 80% sure eth would not get higher than 2k, those 20% i kept, are coins that I'm willing to lose, meaning only a stupid price would make me to sell it, I mean higher or closer to or than 5k, 1k to 5k is a very good return for early investors, so, I advise to sell 80% around this price, other 20% if eth gets higher than 5k, as soon this market crashes, everything will crash 90% ~ 95% from top, people who sold close to top will then rebuy it very cheap, eth will crash to 100 ~ 300 usd again, flash crash, then stabilize around 500 usd for the next 2 years or so then up again to 2k close to eth 2.0 then crash again to 1k then after 2 years then go back top 5k and then 10k. This 5k usd eth is eth 2.0 price, so eth 1.0 is at moment very overpriced. People will take profit and keep life going, so eth will crash a lot as soon life gets back to normal, the vaccine will make billionares sell their eth to use for everyday life things, 40x return is already too good to miss.

Yeah had 1,000,000 doge  at only 2500 usd it grew to 64000

so I sold it. 

I could have held it and got 710,000 to 740,000 with a perfect sale.

I did buy a lot of gpus with the profits and have made good money mining the eth.


You did well and still can get a good sale at 4600  or maybe 5-6k

From what I recall monero was never really profitable ever for me. I remember after ASICs hit Scrypt, I moved on to X11 and mine Darkcoin (now Dash) did that for a few months until profitability went down the drain and there was small cap coins like Jackpot Coin, 8Bit Coin, Boolberry, etc. And it wasn't until a year later that ETH was launched.

However ETH wasn't profitable then. It basically launched, and I think most people dumped their ICO profits and it wasn't profitable until maybe beginning of 2016. And from that time on until end of 2018, mining profits were very profitable.

I bought all those eth when it was around 100 usd, so that was 15x profit by have sold at 1.5k usd, not bad considering I have held eth and saw that march 11 2020 crash, from 300 usd to all the way to 86 usd again, plus other pump and dumps, so it was not easy but i held strong to a point I saw it was time to take profit, yeah I could have got almost 3 times that, I mean my 20% I held is 60% total of the money I got from selling those 80% eth at 1.5k usd but that is what things are, unpredictable, I mean, crypto is like that, it can rise a lot and can crash a lot, so we traders must be very careful about that, I mean, decide when to buy or when to sell, is not easy. I will reinforce here that the time to buy crypto is not now, hold the urge, time to buy is 6 months after the bear market hits, buying when this crashes now is a mistake because it could keep crashing.

if cryptonight algos were not profitable (and other cryptonight coins) then claymore is a failure with his debut "cryptonote gpu miner v1.0 beta".?? hehe

https://bitcointalk.org/index.php?topic=3019607 (https://bitcointalk.org/index.php?topic=3019607)
https://bitcointalk.org/index.php?topic=638915 (https://bitcointalk.org/index.php?topic=638915)
oops i think it was "qoute" but it was "delete"...i just look at the corner of my eye heheh...anyway i screenshot it(opened in another tab). here..

https://i.postimg.cc/13WzJxvB/xmr.jpg

date: June 06, 2014
I would not say thank you if it is not profitable hehe

What I recall was that monero was the most profitable coin in 2017 with the vegas, a 10 ~ 20 usd per gpu. People actually took months before they spread the word how good those vegas were good for monero. Those vegas were being sold on ebay for almost 2k usd, even the rx 570 was being sold for almost 800 usd but at that time the rx 570 was new 14nm, right now the same rx 570 is being sold for 800 usd ehhe, insane. Welcome to teh world where people have more money than sense but they will learn after the crash.

50000 USD per ETH is unrealistic to me, it will be wise to sell your ETH anything over 5k USD because bull trap is real, I don't plan on holding coins in this bull season anymore, any coin that gives me good ROI I will instantly change to USDT and wait patiently for months, bear market and bull trap is real I'm just been careful

I guess the media and thieves brainwash the sheeps, make the sheeps to buy now and then when the bear market comes, the media want these same sheeps to sell their eth for 100 usd ehhe and then the sheeps sell, funny, the same sheeps would not sell their eth for 5k hehe but they will sell for 100 usd heeh, the bullrun thieves aka market makers, make sheeps think this is going up forever and stay there forever ehhe till they drop the bomb in few minutes and the value crash 50% and then after few weeks it crashes 45% more from top, in 2018 eth crashed 17 times, from 1400 to 80, if eth goes to hehell now then the math tell us to buy back at 240 usd, 1400 x 3 = 4200 usd, 80 x 3 = 240 usd. It sounds impossible right now eth at 240 usd but trust me, if this crashes to hehell right now then that is where it is heading to. There will be a last bulltrap, dont think this is done yet.

didn't get the vegas..only 480's and fury/fury x since i was into ETH and ZEC back then.

speaking of more money than sense..here is something that will give them some sense..when ETH goes to 100 the sellers did dream of selling at 500, 600, 700, 800, 900..at 5k and above sellers can start selling..pumps brings out the buyers, dumps brings out the sellers hehe

Yeah, so much truth, trolls and sheeps hate hearing that hehe but fear not, time of their dreams to become a nightmare is very close, keep holding sheeps and trolls.

eth transaction fee right now at 30 usd, i'm tellling you trolls, eth is about to go to hehell very soon

once again.

Jan————- Metroid crash is coming
Feb————. Metroid crash is coming
March——— Metroid crash is coming
April———- Metroid crash is coming
May ———- Metroid crash is coming

One of these months Metroid will call it correctly.

Today eth is 4k+
and it pays over  14 cents an mh at viabtc

at those numbers a 3070 makes over 8 usd a day.

so june 11 it earned 240
and july 11 it would be 480
and aug 11 it would be 720
and sept 11 it would be 960
and oct 11 it would be 1200

will that happen? maybe maybe not.

And yield is 5 times higher if you had hold your coins from last winter

Enough already metroid, all those weeks is already enough to make most of your money invested on GPUs back, I'm glad I don't follow your warnings because I bought my GPUs at Feb of this year and now Ive made them ROI back

I remember in beginning 2018, metroid telling the world than gpu mining was dead. He was suggesting that every miner was a troll (hehe) and asking everyone to sell that shitty cards.

Now he is just disgusted because he sold all his mining stuff, he is the only troll around now :) I'm so happy i have not sold my 30 * rx580 in 2018, now they do 7,50 usd per day each :) sorry metroid, i love you anyway.

Hindsight is always 20-20.  Coming from a stock trading professional... those who think they can time the market are absolutely clueless. 

Those who think Eth is going to 50K!  Buy it
Those who think Eth is going to $300?  Short it

Then cherry pick your timeframe... 6 months from now, its 50K.  I was right!   18 months from now, it's $300.  I was right! 

GPU mining isn't going to die any time soon and also ETH will keep it's PoW algorithm even if they go PoS, I can see new ASIC miners coming in and that just says everything, if those new ASIC miners are not built then I would still be in fear right now but not anymore

hehe, well, I purchased my 2 3080 for 1k usd each in february too but i dont mine with them, I actually use for important stuff, 1, I use for gaming and the other one for deep learning. I'm not a miner, actually, I have never been one, even in bitcoin earlier era, I have always been an investor, buy and sell and vice versa, mining is for losers but hey, is one of my hobbies know about mining and its economics because to be a successful investor in crypto i had to learn about it.

With all those DeFi coming up and cheaper but riskier to do , majority of crypto investor will resort to this new kind of having more ETH than mining .It is simpler to do mining than DeFi because of its complexity in operation

Mining is for losers? Crypto would not exist without mining! So how stupid is your comment? Why your are here in the mining section? The next level for metroid comments. you will become a meme with your statements XD
You know nothing about mining thats the only truth.

the profit in ETH mining per 3080 now breached 20$ going to 30$..

at these mining profits of course he will get salty, he's human. with his know how he can build a huge farm given the right circumstances for him.

metroid is anti-miner here because in his circumstance mining is temporary due to electricity price and "the effort-time-money" equation for him. it is smart for him to do that, just like a shitcoin bag that is not profitable for anyone-they should dump them hence he dumped mining, i would recommend it to everyone who are in his position.

for people like philipma1957, who can blast off for a year or two at the start of the bear market. then you should put mining into your portfolio..just like a successful shitcoin turned major, you hold/trade it and profit from it.

and for people who get triggered by metroid just think about market cycles and trends..metroid was right, then metroid was wrong...hell even crypto low iq newbs was also right after investing in pump and dumps....in crypto everyone has a chance to be right, it is a matter of timing.

this is a good analysis. I met up with buysolar via bitcointalk. turned out he lives under 10 miles from me.

We knew we had the edge in cheap power. due to his solar business it has taken us close to 7 years to be in this position.

we would be stupid not to mine.

buysolar does trade a bit more than me and holds coins longer than me.

I do not need a 35 year income stream from btc as I will be 99 in 35 years.

So for me I tend to play it safer.

LOL I was kinda expecting your comment to be first one saying it's all BS, noobs have no idea what they're doing when they buy cards at these crazy prices, etc, etc  ;D

Re-check your calculations, sounds quite low for the current moment. Right now Awesome miner shows estimated profit for one 3080 around 28 usd/day and it seems right with increased reward, 3070 should be roughly 60% of that.

11.05.2021 was amazing for mining!!! ~284.75$ for 1 GH/s!!!
https://i.imgur.com/e8gt0Zg.jpg

you are correct nicehash has one 3060ti at 19 one 3070 at 19.5 one 3070 at 20.05

the laptop amd 5600m at 34 mh is doing about 11 a day

at the moment it is stupid good.

since much of my cards pruchased from late jan to now were all due to cashing in the doge at too low of a price. I am now making up 🆙 for some of that error as I used that profit to press on the cards.

I am in a funny spot as I am now making a lot in the house without much noise and heat.

plus weather has been cool so no ac needed.

when these back off in profit i will move to warehouse.

i have 3x 3060ti pcs coming
i have 1x 3070 pc coming

this is 240mh or about 65-75 a day

Mining with laptop too, are we  ;) Just kidding, I'd fire my laptop up too while these daily profits are crazy, but unfortunately it only has 4GB 1650 GPU.


I'm getting jealous. Only one 3080 is on the way to me.

You can still mine ETC on that laptop of yours, 4gb is doable today compare to weeks back, I can bet something around 4$ from ETC with a gtx1650 right now, the truth is this insane amount of profits won't last forever, I can smell bear market coming already

Not sure about $4, more like $2 or less on ETC. Not worth burning an expensive laptop for it.

i will most likely return the laptops

This laptop is my work horse, I bought it just a year ago.

if you use it for other shit do not mine with it.

I have mac minis for my non mining pcs

It's never going to be over for GPU mining even if Ethereum stop been profitable or if ETH change its PoW algorithm, there are many new and old coins that still runs on proof of work algorithm

Mining ERG is more profitable than ETC and more than ETH also  :D
You can also mine ERG+ZIL for more profit.

There are so many alternatives out.

Nvidia continues its offensive on mining and has deliberately limited the mining capabilities of the three new RTX 3070, RTX 3080 and RTX 3060 Ti graphics cards, calling them "lightweight hashing speed," according to a May 18 announcement made by Matt Wuebbling, head of global GeForce marketing at the company, covering this with concern for computer game lovers. https://blogs.nvidia.com/blog/2021/05/18/lhr/

yes be careful what you order.

and if you have older good 3000 cards this made them worth more

just make sure you sell as you go that erg coin cause once this crypto market crashes to hehell, those altcoins will suffer a lot, most likely will lose 99.9% of their value today.

Yes, it is. But as i see, right now nethash or ERG is x2 from week ago and grows up. And summary trading volume is about $15kk. If you mined ERG before - this is good time to sell. But to mine it right now - you can get some profit probably for 1 day, maybe less.

Actually this is still time to sell everything, price is good, not sure what will happen yet, I will still follow my prediction that thieves will create a last bulltrap --> btc 79k then they will crash it to 10k. They will try to steal money from the sheeps one more time and in that move they will make sheeps to believe will go to 100k then crash from 79k to 30k in few minutes then a week later from 30k to 5k then rebound to 10 to 15k and stay there for the next 4 years or so. They need time to prepare for the next bullrun/thievesrun. BTC flash crash from 30k to all the way to 10k ~ 5k very possible, 90% to happen when this goes to hehell. The same thing will happen, I mean i never thought eth would get to almost 5k this bullrun, I thought maximum would be 2k and then look 4.3k, same thing happened in 2018, I thought eth would never crash below 300 usd and it crashed to 80 usd, I myself think eth will not crash lower than 300 usd ever again, maybe I will be wrong again.

Also you trolls need to be very careful with altcoins, hype is what dominates this market as 99.9% of coins is pure speculation, look at dogecoin, greatest example of hype/speculation peak, look at vtc in 2018, it hit 10 usd, now the maximum it hit was 2 usd, so it never got the to highest it got in 2018. So be very careful buying or mining altcoins right now because this value right now may never return once this bullrun ends. Most coins will be dead next bulrun, thieves will create other coins, they need to hype new coins in order to steal the meat of the sheeps.

So mine and sell, this is not the time to hold anything, this is the time to sell and forget unless of course you are willing to lose that money then hold and see where it goes ehhe

This is 2018 all over again, coins that I have never heard of popping from nowhere in hopes sheeps get in then they trap the sheeps. I mean there is a coin that is called internet computer coin that costs 172 usd, what thehell ehhe, never heard of it, it was created on 11 may 2021, last week, then the thieves inflated it price to attract sheeps, I mean its market value is 21 billion hehe at moment, ranked 9th, what the hehell is that. 2018 all over again.

Too many red flags everywhere.

I began to sell about 1.5 months ago. Not everyday, but everyweek. I lost some profit, but i`ve got enough. Too many people that dont know anything about mining or cryptocurrencies. Usually it means that dump soon.
And again you are right about cryptocurrencies that noone know.

BULLS*t Mining is for losers.... I've made well over 13K just from mining alone and with the coins was able purchase what I needed and still going strong.. Pfff, you don't knoow what the hell you're talking about.

There are different ways to get money. I dont know how to trade but my skills are nice for mining. Someone is good in trading but cant understand how to mine. Noone can know everything.

LOL at massive dumps today  ;D

illiquid shitcoins: "what is dead may never die"

funny, trolls saying all the time china banned btc, I guess little they know, china banned btc in 2014 and 2018 too and that was one of the reasons btc crashed to hehell too ehhe, the chinese always create a story to ban btc again and again to crash it hehe, funny the chinese only bans it when they want to crash it ehhe

I still have that 20% that I'm willing to lose, now I say that " I wished I had sold" phrase however when it was that high I would not sell ehhehehehehe

Few days ago I transferred most of my usdc to my hardware wallet just in case, some exchanges when this happen simply disappears, so need to be extra careful from here on, in times like this must never leave coins in exchanges if you are not going to sell. I thought btc would not crash below 32k and it did, so my expectations are always off, it always crashes or rises more than I think.

This might rebound fast and then crash hard again, need to observe the dead cat bounce syndrome now. I'm still hesitant to sell those 20% that I'm willing to lose. This might have been a trap for all we know.

The good thing if this keeps crashing, gpus will be very cheap ehhehehehe, nvidia will revert their lock eth mining bs because nobody will buy gpus anymore and so on hehe

Also about mining, mining profits also crashed 40% and hashrate still increasing hehe, now is the race who will start leaving the mining game, little by little people will start leaving the dream --> " get rich fast" in mining hehe, the dream will become a bother, nightmare, not fun anymore game hehehe, funny, like in 2018 most will not even get 30% of the roi.

Mining is ok. Wtm shoes today i mine more than yesterday. Commissions grew up. Today i mine x2-2.5 ETH, or x1.5 if count in USD. Of course it will be about 1-2 days i think, but tomorrow can be pump and i`ll get x3. But noone knows pump or dump we shall see :)

What goes up forever? Nothing I guess so it's stupid to keep buying graphic cards thinking that this present mining reward will be here forever, you will end up been disappointed, GPU mining is here to stay but rewards from here on won't be satisfying so how prepared are you guys? Even ETH going PoS fully this year isn't a joke.

Even now, it is profitable to buy video cards, because the payback period for the equipment is about 8 months. Analysts say that by the end of the year the prices for video cards will be very high and there will be a shortage of video cards on the market.
I think that it will end only after the start of the work of Ethereum on the POS algorithm

In the first quarter of 2021, Nvidia's sales increased by 84% compared to last year. The company acknowledged the contribution of miners to the growth of the business, but said that it is difficult to assess. https://seekingalpha.com/article/4431541-nvidia-corporation-nvda-ceo-jensen-huang-on-q1-2022-results-earnings-call-transcript

As of this morning eth pays only  $0.0724 a mh

It peaked at close to $0.2100 a mh

translation

a 100 mh nvidia 3090 now earns $7.24 a day
it did earn as high as $22.00 a day

it burns about 300 watts in a 1 card rig or 7.2kwatts a day

burns
at
$ kwatt>>daily>>monthly>>>yearly
50 cents $3.60.....$108.00......$1296.00
40 cents $2.88.....$ 86.40.......$1036.80
30 cents $2.16.....$ 64.80.......$ 777.60
25 cents $1.80.....$ 54.00.......$ 648.00
20 cents $1.44......$ 43.20.......$518.40
15 cents $1.08......$ 32.40.......$388.80
10 cents $0.72.....$ 21.60......$ 259.20
 5 cents  $0.36.....$ 10.80......$ 129.60
 3 cents  $0.22.....$  6.48.......$  77.76

earns
at

20 cents an mh  $20.00....... $600.00....... $7200.00
19 cents an mh  $19.00....... $570.00....... $6840.00
18 cents an mh  $18.00......
17 cents an mh  $17.00......
16 cents an mh  $16.00......
15 cents an mh  $15.00...... $450.00........$5400.00.  gold for they are as good as gold


14 cents an mh $14
13 cents an mh $13
12 cents an mh $12
11 cents an mh $11
10 cents an mh $10.00....... $300.00.......$3600.00

09 cents an mh $ 9.00..........$270.00.....$3240.00
08
07 cents an mh $ 7.00........ $210.00 ......$2520.00  
06
05
04 cents an mh $4.00........ $120.00........$1440.00 these are all in the black even with 40 cent power you make 440 a year

03 cents an mh $3.00.........$ 90.00
02 cents an mh $2.00.........$ 60.00
01 cents an mh $1.00.........$ 30.00 red for you are close to dead
 

so at 07 cents today it earns 2520 in a year and burns 518.40 at 20 cent power so a 3080 still makes about 2000 in 1 year. If you have 20 cent power.

Nvidia is not the only company to have similar earnings like this compared to last Q1 2020. Look at Apples sales on iPads. I think their's was something like 80% more iPad sales in 2021 compared to 2020.

If I recall when the pandemic started, everybody wanted to get an iPad or Macbook because they were stuck at home and wanted to play with apps and watch Netflix. You would go on Craigslist and prices increased maybe by 50% for second hand iPads. I remember an iPad Air was like around $100 before the panedmic, after the pandemic it was like $150 or so.

The stores were closed so you couldn't go in person to buy one. Later the sales were online only and people finally could start  buying them. So this is why the Q1 2020 sales were so little compared to Q1 2021 so it shouldn't be a big surprise.

Here is what I don't get.

 Nvidia must have some insight on the future of GPU mining. Popular thought has ETH POS coming online soon. Why then do you announce

more nerfed GPU offerings? Why go to the trouble of complicating your supply chain since in a few months ETH POS should dampen if not kill off

GPU mining demand?

Many people will stop mining or even sell gear,right now people selling when still prices are overpriced. I see rig prices are better than last month. It is too early say anything i think couple years later will be more clear. 1 thing makes me think positive is amd and nvidia these 2 companies are giants and they tasted 1st cake ever since bitcoin existed. They know how much money brings from gamers and miners. Miners was best profit for these 2 companies and i dont think they will lose this valubale customer.

Because there is still large number of gamers that wants to buy new gpus but can't because AMD and Nvidia are selling gpus straight to miners for higher prices.Eth diff from beginning of the year is proof that gpus are being manufactured and not "logistics/korona" problems

GPU mining don't look so good to me right now because of the upcoming eip1559 upgrade that will surely reduce mining rewards and also we still don't know if ETH will walk away from PoW algorithm, if that happens GPU mining will be in trouble because no new altcoin or old altcoin can handle all the Hashrate power from ETH network

Nice, I think you are right! NVIDIA will fall in a couple of years with its latest decisions about their GPU's.

Nvidia can just do what it did after the last bull run and sunset their mining card division and take a write off. 

For a new product line they said they did $150 million in CMP card sales last quarter and expect to do $400 million this quarter.  Big farms are spending a lot still and Nvidia is playing all angles right now.