Back in relatively recent 2017, when there was a peak of gold cryptolichorads, I decided not to miss this opportunity either.
I went to a local hardware store, bought some wooden bars and assembled my small mining farm for 4 GTX 970 graphics cards.
Something human in him seems to be starting to sprout)))
The total cost of investing in this miracle of cryptography was about $1,400 - the video cards themselves were priced above market prices at that time (about $250 per 1 pc.), two Chieftec 750 W power supplies, an AliExpress motherboard with 6 video connectors, a minimum of RAM and other rattles, such as risers, adapters, etc.
I installed an operating system, a mining program, and connected to a pool to withdraw minted coins to my wallets.
I controlled the mining process remotely using TeamViewer, and the farm itself was chugging on the balcony, where the temperature regime was most optimal when loading maps at 90%. The volume of exhaust depended on many factors, including the complexity of the network and its load.
The power of such a device was low, and the maximum that could be squeezed out when solving certain cryptographic tasks with the Proof of Work (PoW) consensus mechanism based on the Equihash algorithm were ZCash cryptomonets and coins from a local manufacturer, the Belarusian TLR crypt, based on the Lyra2z algorithm.
The average monthly volume of electricity consumed was about 800 kWh.
As a result, the investment paid off by only 40% of all investments, after which the enthusiasm to do this business on such a mining farm disappeared. ASICs have already appeared and the purchase and sale of tokens through cryptoplatforms (exchanges) has intensified.
Everything that I managed to dig up, I brought out through the stock exchange and exchanged for, as it seemed at that time, promising coins tied to oil - Venezuelan Petroliums El Petro and some other interesting cryptomonets for me.
The exchange was Cryptopia (New Zealand), which was subsequently hacked, and I had to say goodbye to part of my crypto, and I managed to redirect the other part to Exmo, and with these funds I already bought some Chinese assets (which I don't regret now).
In the end, what do we have?
Yes, losses, but also gained experience.
Now the approaches to investing are completely different - they rely on fundamental, tokenized assets (including instead of brokerage intermediation when investing in stocks, indices, raw materials, etc.) and cold storage facilities (for crypts).
Now this farm is without video cards, as a rarity and decoration for the Christmas tree)).
P.S. I only have a small Christmas tree))
If at that time, I would have invested all $ 1400, for example, in ETH, which at that time cost about $ 100, then today there would already be, among other things, a very good reserve for current reinvestment in interesting projects.