Realize losses

I own $SQ (+1,62 %)
$TTD (-3,62 %)
$NOVO B (-1,79 %)
$MSTR (+1,94 %) and am now 20% to sometimes 45% down on Novo. How do you deal with such losses? I'm wondering whether I should realize the gains in Block, for example, and rather buy shares in which I see more potential and which have just fallen. For example $CSU (+0,96 %)
$PLTR (+1,04 %)
$HIMS (-0,53 %)
$RKLB (+3,91 %)
$1810 (-2,62 %)

How do you do that? Do you continue to hold on to the shares or do you leave them in your portfolio despite halving your original investment?

Nuqqx@Nuqqx

Can also be offset when taking profits - so that you save a bit of tax

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Thomas@Thomas_1963

After my negative experience with $TRMD A, I will certainly not allow it to be halved again. At -20% at the latest, it's over. Then I will sell.

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Keineui@Keineui

I have realized $EVT and $S92 painful losses. On the one hand, it is currently helping me with capital gains tax and, on the other, I was able to build up a good portion of $HAG.

Realize losses?