I was an early miner, got a few, started when it was less than a dollar, and cashed in when it was low hundreds. I don't think anyone knew it was gonna explode 5000X or more. Every early miner or bitcoin developer regrets they didn't buy more, mine more, or hold on to it for longer.

But the truth is that at this point, it's still mostly gambling. The use-cases for BitCoin are numerous, but I don't see many in place just yet. Right now, the value is based solely on speculation.