ASIC Mining vs Mining Rigs

So, can anyone fill me in on what's better these days, ASIC miners or mining rigs? Also, what’s the deal with the profit margins for both?

This is area is for Bitcoin mining only and that means using ASIC-based miners, PERIOD. Difficulty has been too high for anything else since at least 2014. 'Mining rigs' are only suitable for mining altcoins and discussion about them belongs in the altcoin areas.

Is using mining rigs for BTC specifically not a viable option anymore? How come ASIC-based miners are better?

Read the pinned msg at the top of this area, mainly point-3 The main point is that CPU/GPU's are generalized hardware designed to do many different things. Being programmable means that there are many different operations going on moving data between various registers and buffer locations when processing data and all of which consume many clock cycles for each hash operation. as their name clearly states Application Specific Integrated Circuits are hard-wired to do 1 thing and 1 thing only. In our case they crunch sha256. A single ASIC chip contains several thousand cores (the Bitfury chips in the Apollo each have 4096 cores) with each one working on different nonce value and spit out results every clock cycle in pipelined operations. Add to that the fact that most modern miners each contain several hundred of said ASIC's and there is just no possible comparison in computational density and power efficiency.

well I would argue that this section should not exist and that all mining should be rolled into one section. But reality is BTC mining with an asic miner like an s17 or an s19 belongs here. indirect btc mining with a gpu rig on nice hash belongs in alt coins. here is and example of mining btc on nicehash https://www.nicehash.com/my/miner/1Q9iWR8ij9pXzVP2T6hR4mm8Z5mtyNKWsZ it is 3 pc's and 6 gpu's https://www.nicehash.com/my/miner/1Q9iWR8ij9pXzVP2T6hR4mm8Z5mtyNKWsZ/stats it earns btc via converting eth to btc. about 10 dollars a day it burns under 700 watts that is about 17 watts a day my power cost is 13 cents so 13 x 17 = 2.21 10.00 - 2.21 = 7.79 profit  this gear cost about 5000 a s17 is around 4000 it earns about 11 bucks and burns 53 kwatts or 6.89 so 11-6.89 = 4.11 profit so I would argue that having gpus  on nice hash could be better.

Mining rig is generally used to mine Ethereum ,litecoin and other altcoins whereas an asic miner is only used to mine bitcoin. I think asic miner will be more profitable as bitcoin's price is rising ,but because of the rising bitcoin price it is becoming even harder to mine bitcoin ,so you will need a lot of asic miners to get about 50$ -60$ daily.

It all depends. If you have cheap power and 10k+ to spend on mining equipment, one could argue that it's easier to maintain and service a single $10k SHA256 Bitcoin ASIC with similar yield to 10 $1k GPUs with obviously many more points of failure like 30 fans and such. But for small-scale, I noticed in pure profitability aspect, it seems GPUs are no bad choice and you can get paid out in BTC indeed from some services. However, if you like mining 'real' Bitcoin at home, thus supporting the network and not giving hashpower into shitcoins, there are a few things you can run quietly and at low power at home. It's mostly either an Apollo BTC, some Compac F's and I believe also downclocked S9's are a possibility. Even if you don't 'make profit' but barely cover power costs, you'll be getting non-KYC attached Bitcoins and DCA'ing through the power bill, which is a pretty cool concept. Even if you get slightly less than your power expenses, you can think of it as a 'no-KYC tax', but in many places you're going to be 'DCAing with a discount' if you mine at home, getting not only BTC anonymously, but even for less cash than if buying on an exchange.