Those thoughts are for home mining
Acording to my calculation i should get 40 cents per card per day ( profit , mening after electricity is paid ) to cover the loss of resale value over time. Now i get a dollar per card per day (profit) , I wouldn't start a new rig any less than that.
Pro's :
* If you buy the gear at a good price and sell at a good price when it is time to sell, there is profit to make
* It is a nice hobby, when you buy gear for a good deal it makes you happy. Also looking for gear, re/searching for cooling, ventilation ideas, keeping up to date with technology is nice.
* If crypto rally starts, you'd be ready to make enourmous profits
Con's :
* It takes time to run the rigs
* They could be stolen and you'd be left with less money than you had before, it is no guarantee that you can get your money from insurance becasue good luck explaining crypto currency mining to insurance inspector it's not typical home usage.
* Although unlikely ( unlikely if you use quality cables and gear ) there is risk of fire since a makeshift looking strange computer runs in your house 24/7
* They make a lot of noise and generate heat during summer , it effects quality of life in your house
* When it is time to sell your gear, you have to deal with a lot of idiots and kids and idiot kids
* You don't know what will happen in future, 8 months ago my rig didn't cover electricity and I shut it down
* Your competitors are not smart, Some of them operates with a loss so it's unfair competition.
Let me explain this: 8 months ago when mining is not profitable some people argued mining low difficulty coins and keep them then sell them later. This is not a good idea, because this is not mining, this is investing. Just mine the most profitable coin than buy the coin you think it's pricess will go up. Keeping the coins is risky , you can loose it all. I bought some steem coin from 0.70 cents, now steem is around 0.15 . That is a treamoundous loss.
-Some people (competitors) buys very expensive gear (RTX 2070, RTX2080ti and they will not cover the loss of resale value i they wont make a profit ( probably they don't need it ) but in the meantime they raise up difficulty and everybody will loose, only nvidia wins