as others have said. satoshi's stash is not stored on a single private key, its split up as 50coins over thousands of keys.
also by the time d-wave sort themselves out a protocol on how they are going to control their non-binary transistors the circulation of bitcoin should be diluted around a population where no one should have huge hoards in a single address to be a visual target.
Notionally, that would make it potentially more profitable
nope. the opposite.
firstly d-wave (quantum) is not about counting faster than binary. its about vector math of 3 dimensions(3 choices) instead of 2
so i know your thinking with binary, brute forcing ANY key by simply starting at 0 and counting up until you find a key with something on it.. if there are morekeys used and becomes more populated.. then chances are higher
BUT quantum wont help with that. quantum is only slightly better at counting from 0 up than binary is
quantum would be better than binary at having known vector/data and solving the solution to that vector faster than binary.
EG quantum can break a specific ecdsa key faster than binary.. but cant brute force from 0 to whatever number to get to the same key much faster.
to brute a private key is like asking your descendants multiple generations in the future to continue your project using current binary or quantum.
but cracking a specific key, knowing part of the vectors involved and trying to find the missing piece. doing it with quantum would be faster than binary
thus my point, imagine it can be done in a year.
as long as people dont store a years worth of costs on a private key they wont be a target