Cause everything is stupid and you can’t choose your own HSA, I had multiple at one point. It’s easier to merge them all and close the rest so you aren’t keeping track of a ton of accounts.
Edit: Also if your investing there are better or worse accounts, so moving all the money into one can help make you more money.
It’s an HSA, keep as much as you can in it. Use it for medical if you have too. Let it become functionally an IRA when you hit 65.
Cause everything is stupid and you can’t choose your own HSA, I had multiple at one point. It’s easier to merge them all and close the rest so you aren’t keeping track of a ton of accounts.
Edit: Also if your investing there are better or worse accounts, so moving all the money into one can help make you more money.