What is Reddit's opinion of AntMiner V9~4TH/s @ 0.253W/GH Bitcoin/Bitcoin Cash ASIC Miner (V9)?

From 3.5 billion Reddit comments

Yeah, looks this one

https://www.amazon.com/dp/B07BPZGFM7/ref=cm_sw_r_cp_apa_glt_fabc_XXJ42Y0352J1TX2MQNVD

https://www.amazon.com/dp/B07BPZGFM7/ref=cm_sw_r_cp_apa_glt_fabc_XXJ42Y0352J1TX2MQNVD

Here's a handy chart for you. Short answer is yes, it's profitable, but it certainly requires some investment.

There are also mining rigs which do not run off GPUs - example here. Since GPUs jumped up in price significantly, these kinds of machines can be more profitable in the long run, but are very expensive upfront.

There are also specalized USB miners such as this that could be transported with you, possibly left somewhere so you don't have to pay power for it.

> I tried using a calculator and most of the terminology was confusing

All the answers have the same terminology, whether you use the calculator or ask in this subreddit

Is it this one?
https://www.amazon.com/AntMiner-V9-4TH-0-253W-Bitcoin-V9/dp/B07BPZGFM7/

Here's your answer ...
https://www.cryptocompare.com/mining/calculator/btc?HashingPower=4&HashingUnit=TH%2Fs&PowerConsumption=1027&CostPerkWh=0.11&MiningPoolFee=1

That calculation assumes today's Bitcoin price, which will go down, and the current Bitcoin difficulty level, which might go up or down depending on unpredictable future events in the ASIC manufacturing industry