I got into crypto as it unfolded. All I needed to do was swap my folding compute power to bitcoin to dabble, then I took it more seriously later.
Profit is all a calculation. See, I know this is a thread mainly about investing, but one thing I don't get into is the investing side of cryptocurrencies. I only follow to utility side, the code, the math, the function. Investing is a separate argument, even though when done right, you can pretty much see returns that rival the historically best stock investments. Mining is a separate discussion too, you mine if you are interested, and people mine for various reasons. A lot of people mine just to secure the network. Every transaction has fees, the fees are recycled back into the mines as rewards, so bitcoin mining works forever as long as transactions are made. But if you read the white paper, you know this.