It depends on how you are mining. If you are mining and selling the coin on a day to day basis it's not good right now. You need to be mining with the assumption of what the .00135 BTC will be worth in the future or else your numbers will be screwed up. There is a real possibility that btc will be 25k-50k sometime this year. If you can mine now and sell later I think you will be good. Yes it could also go down but there is no reward without risk. I feel like a lot of people want to mine because they think it is a guaranteed way to make money and they just sell their profits daily because they don't want to take a risk.
This has been brought up many times before. It's just a fallacy.
Once you get to a point where your miner is not profitable based on today's value of bitcoin (either it's not going to ROI if you recently purchased it, and/or, it's costing you more power than what it generates), it's always better to invest your money directly into BTC if what you're banking on is BTC value to go up. That's just a fact.
Mining at a loss is different from mining at low profit. Mining is just a more passive way of investing.
That is true, and if you have a miner that has already paid for itself then you can still do this for a while. But you're probably still better off selling it now and buying BTC with the money as you probably won't be able to once it becomes unprofitable (very soon).
A recent S9 purchase though (or future purchase) is currently not predicted to ROI, thus it will be mining at a loss at current BTC value and so if youre just doing it because you think the value of BTC will go up it is better to use the money to buy BTC now than buy a miner that makes BTC, youll end up with more BTC in the end.
That was the whole point of the argument.