i think the biggest regret about not buying back then is the fact that probably nothing again in our lifetime will explode like bitcoin did,  amazing if you just bought in 2012 2013  and held which would be hard (but not so much if you joined forums like this that rammed HODL to death)  but  its not like double or triple ,  THIS WAS LIFE CHANGING MONEY many of us missed out.    I dont think the people who bought in 2017 are teh lucky ones, its the ones that bought in 2012 2013 and kept going.    Doubt this kind of thing will ever happen again in our life -  everyone knows the deal now and sees the potential which makes me think the next big will be back to 15k not 20k and each repeat will be lower 10k  etc,