Here's an elegant but expensive ( if bought commercially) solution to the problem of using the bigger binoculars .
You might successfully hand-hold a pair of 14x70s, but I have my doubts that anyone could view through 25x100s in a comfortable way.
This is a very xxxy commercial product, a parallelogram binocular mount, that left little or no change from 2K Ozzie dollars.
But it enables me to Move and to Point and to Support my 25x100s, and to view through them comfortably, with almost the same ease as if I was hand-holding a pair of 7x50s.
The 100mm Binos weigh 4 kilos, and at 25 power, you are essentially faced with the task of having to mount a telescope tube that gives a telescopic view; they function more like a telescope than anything else. So the main problem the user faces is " how on Earth can I actually use these things???"
Cheers,
madbadgalaxyman