My b.f and I lost 25k between us for not taking profits at the peak too. He had the bulk of it, so it's hit him far harder. He still beats him self up about it and then feel's angry at him self and say's things like 'oh it's only money i should not get so upset etc'. I have told him it's ok to be upset, it's not just money, it was a hope of a bit of financial freedom, we've learned our lesson we essentially got greedy- it will go up more etc. You and us and probably most of the people invested did exactly the same thing.
The crypto world since then has been rather disheartening, but as you said it's all in waves, it can't be stagnant - it feels it at the moment, but the next wave will come.
We'd probably have blown it all anyway! Ha terrible with money. With me not working full time at the moment either we're learning how to handle it much better, never realised how wasteful i was with it, and i always believed my self to be 'good' with money. The last 6 months has been tough, bills aside, i have learned that i can actually get by with next to nothing, i would not choose to be in this position no, but as each month passes im less fearful, i am getting by, don't get me wrong is sucks balls! But once bills are paid, it' surprising how very little you actually need. The rest is just stuff you want. Im going to make him read this blog, i think it would help him.