Reserve assets and investments are completely different things, tho. They're not things that are in competition with each other; they're different categories that you divide your income up into:
spending and investments (LN, fiat cash, and banking account)
savings (Bitcoin hot wallet)
reserve asset (Bitcoin hard wallet and gold)
The reason why I say that I consider sats "normal money", is that I now use it for all three levels and nearly all of the money I hold is in Bitcoin and it's what I prefer to use.
Fiat is only a throughput currency.