If you can delight or surprise someone with an act of generosity, there’s never been a better time to do that than right now.
Philosophically, we can debate whether or not it is selfish to give something in order to create some goodwill for yourself at some time in the future. There have been entire books written about that.
But the bottom line is that people will remember you for what you do for them right now, when they’re stressed out, or even down and out.
If you’re supposed to be there for them, keep being there for them. Don’t disappear.
If you can give a little extra, do that too.