Framing the debate as "your grandma or your 401k" is precisely the gas lighting that prevents rational discussion on this topic
I shall not buy what you are selling.
The stakes are not "my stocks". The stakes are civil society, which as you may or may not know, can't exist for long without a functioning economy.
We must take care of each other, it is our basic obligation as citizens of a civil society, and this is the only way we can do that right now.