The biggest giveaway was during 2009 when you could mine bitcoin blocks using only your CPU and get the 50 bitcoin reward for each block you'd have found, that reward is currently worth $5 mil 
Thats so incredible well at that time they are mining it without even realizing its worth and value as bitcoin spikes a lot few years after. But thumbs up to those who did this and even holding at this time of period. This is their biggest win not in just crypto but in life indeed.