What the f+ck does HODL mean?
AFAIK, HODL is a typo that someone made in this forum (maybe on this thread, was it?) which later became a backronym for "Hold On for Dear Life".
It is the advice given by those who want to dump to those who are supposed to sacrifice their money for the noble cause of pushing the price up.
Just buy one is the pump. In 2011 @$2 I gave the same advice I give today just buy 1, and if you can't afford to lose the cash just invest what you can live without and hold. I've given away way more in value ( as paper wallets and donations) than I've invested with the requests to hold and if you need assistance sending it ask for my help. I'll even send you one Bitcoin if you promise to look after it and send 0.5 back when it's worth $10,000. (Personally I think it has less chance of being stolen if you invest your own money)
The thing with scams and stealing is real but it adds value, to the system. The idea of justice you keep is an authority meme built on the meme that all land belongs to someone and you have to rent or buy it. The only rules in reality are based on natural selection viewed through the lens of universally preferred behavior, dynamic not entropic.