I've had an HSA for some time but haven't put much beyond the basics into it. I'm leaning towards fully funding my HSA with the additional money that I was previously putting in my 401k beyond the minimum to get my employer's match. Basically, I see many advantages to invest through my HSA rather than my 401k.

Here's my question: I still want to use my HSA for medical expenses but I don't want those expenses to take away from my retirement. Is there a strategy out there that you've seen that will accomplish this? I've thought about doing something like making an additional contribution to an IRA or Roth IRA every time I use my HSA for a medical expense. For example, if I pay $90 towards a doctor's appointment, I would make a one-time $90 contribution to another retirement account so that my overall retirement investment hasn't been affected. Is that weird? Is there a better strategy for doing this?