It's a sort of sunk-cost fallacy anyone who invested into litecoin are exhibiting, considering the original premise is broken
Where in the Satoshi whitepaper does it say that Bitcoin is only to be mined with ASIC? lol?
It says that nowhere. It also makes no claims about resisting the inevitable. Satoshi knew CPU was not the final frontier.
Initially Bitcoin was mined with commodity hardware (CPU, GPU). When it became apparent we are on a road to centralisation the playing ground in the distance no longer looked level. Some people didn't like that.
Therefore huge reason for adding Scrypt as a proof-of-work into a bitcoin clone, instead of straight copy pasting bitcoin with a shorter block interval was to allow for a diversification away from that- a safe haven if you will. Back to 1 CPU 1 Vote where everyone is on level playing ground.
That's the reason it gained so much favor in the first place.
That was an ultimate selling point. Now that ultimate selling point isn't valid- in fact it's MORE centralized than bitcoin.
So why invest into litecoin OVER bitcoin? What does it do for me as a random individual that bitcoin doesn't do? Those are the questions I would be asking.