The barrier is not a hard one, so this is all about transitionning. That being said, the code will require some hard numbers; and such a number will eventually be arbirtary.

If we use the Pareto principle (which what is usually done in such a case), then 80% of coins is reached at 27K per address presently (people not in the richlist represent less than 4%). Now, we don't want 'most people" to abide by this "stop staking" mechanism so we'd have to tighten the set.

100K per address is still 60% of the richlist, so still too much - I consider that 25% of the money supply is still a lot and, to make things round, I would use the "opposite of Paretto", 20%. To have 20% of stake stopping, we shall aim people who have more than... 900K. This is 8 persons! So, at present, stop staking would apply mostly only to hypillionaires (we have 7 hyppilionnaires).

This is a pretty restricted set, but this also mean this will hopefully be easier to enforce. Now, the boring thing is that we don't know them since the address claiming has not been fixed.

Bottom line: I suggest this:
If the address as less 900K or more HYP, activate conditional stopstaking
900K shall be a variable, though, and I do not know how to calculate it

Presently, the lowest address eligible (that is, the address the closest to 900K) has 1.5% of the coin. This could be our magic number: If the address contains at least 1.5% of the total coin supply, then activate conditional stopstaking.

Opinion?