Do you own stock in any industry near the galactic core of SDSSJ1430+2303? You might want to sell that while we're still outside the causal lightcone. Unfortunately this is probably all mostly priced in by now.
The opposite of HFT is ULFT: stock trading on a gigayear timescale outliving the typical planetary civilization. Its biggest enemy is inflation -- meaning cosmological inflation, that nasty phenomenon tearing the universe apart and doing a number on intergalactic shipping indices. To quote an extremely recent earthling philosopher: intergalactic trade grows strong when elderly hominids plant {untranslatable #32} in whose {untranslatable #993} they know they shall never {untranslatable #440}.