It depends on the timing - spending during the bear market hurts, because soon afterwards you'll start regretting it, thinking "those coins are worth 4-5 times more now". Spending in the bull run can also hurt, when in one week the price is already 20% up. I currently want to buy a few things, but I wait for Bitcoin to go back to at least $14k.

Coffee is a small purchase, so the effects that I described would only amount of a couple of $$ of potential value lost, but it can quickly add up if we are talking about buying coffee every day. So, to me this perma-bullishness definitely makes Bitcoin less attractive as a currency to spend. Maybe in 5-10 years when the market will stabilize, I'll be buying coffees with no regrets via Lightning Network.