Agreed, as long as it's in shape mechanically, (shifters, brakes, drivetrain) it can handle probably more than what YOU can handle. No offense.
You don't need a new bike to have fun!
You also don't need a top of the line bike to have fun!
You just need a bike!
L8R
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"Life is not a journey to the grave with the intention of arriving safely in a pretty and well preserved body, but rather to skid in broadside, thoroughly used up, totally worn out, and loudly proclaiming, "WOW, What a Ride!" - unknown
"Your Bike Sucks" - Sky Yaeger