complains about how they could have bought in at such a low price and kick themselves for being dumb for not buying (or worse, they buy in at the high point).

At the bottom of the bubbles, everyone kicks themselves for buying high or not selling everything at the top (or worse, they sell everything at the bottom).

Meanwhile, long-termers patiently accumulate at the lows and realize profits at the highs.

This is universal behavior in any market, just exacerbated in volatile markets like blockchain.