As a cautious bitcoin evangelist, I think stories from @CHIEF are still potentially possible if someone gets into bitcoin today.
Forgetting the per-bitcoin price, his friend basically turned $30K into $700K. Is there still room for a >20x return if someone got into bitcoin today? While it seem crazy to think that bitcoin could ever approach a $2m/bitcoin price, someone would have had previously said the same of $90K.
I've seen estimates of the global gold market at $19T whereas bitcoin is at $1.75T today. I think there's a strong argument that bitcoin could catch if not surpass gold. That simple math takes btc to $1m each. Now if sovereign funds (middle east, norway, perhaps the US or EU) would get into the mix, no one has any idea what that would do it.
Or bitcoin could be worth a few pennies next year. who knows. But if you invested $30K today, your max loss is 30K with an arguable potential gain of >10x.