I guess I'll go against the grain of literally everyone here that has posted so far.

1. Do you believe that Bitcoin will still be around and growing exponentially 10 years from now? 20?

If the answer is yes, then

2. Do you believe that the bitcoin price would at a minimum, increase 5% or greater per year on average, handily beating your current mortgage interest rate?

If again the answer is yes, then

HODL your bitcoin as an investment and keep paying your mortgage payment. Payoff your remaining mortgage years down the road with your bitcoin, and live on the rest.