Can someone please explain why everyone treats HSA funds like an investment vehicle. The HDHP is a great way to lower insurance premiums while still insuring against major medical expenses, but I don't understand why you would want to add funds in excess of the yearly deductible. Are other bogleheads counting this as part of their investment portfolio? Or do you just consider it a tax advantaged part of your emergency fund?
For reference:
Boglehead Wiki article