Let’s talk about hash functions.
SHA-256 always produces a 256-bit output, which is 64 characters when written in hexadecimal.
To be honest, I hadn’t paid attention to this before: after downloading wallet software, you can compare its SHA-256 checksum with the one published by the official source to make sure the installer hasn’t been tampered with.
$BTC mining is essentially the process of continuously calculating SHA-256 hashes to find a result that meets the difficulty requirements. Currently, 79879.9.
Try to invest only what you can afford to lose.

For the record only; this is not investment advice.