Low Interest Mortgage With The Low Interest Rates, What Should I Pick As A Maximum On A 5 Year Fixed Mortgage?

With the low interest rates, what should I pick as a maximum on a 5 year fixed mortgage? - low interest mortgage

Because interest rates on mortgages are low, I can afford a larger mortgage when interest rates are higher. But if I have a 5 years fixed rate mortgage, do not want a house, not in 5 years when interest rates may rise to pay to be glued. So, what is the general rule for choosing a maximum mortgage?