Bitcoin is very volatile, not even from day to day, but sinking much in between the halvings and rising too much around it.
Every market that is subject to speculation will be volatile. It not only Bitcoin.
Perhaps the timespan between the reducing of the availibility is to long for humans.
Apparently, the time span is long for naive and impatient crypto enthusiats.
Some even call it a cyclical asset.
Every asset has its own cyclical season.
Perhaps the guess for the halving time for 4 years was a little bit to long.
For a more stable constant rise and a mature asset perhaps it has to be a shorter period
then nearly half a decade.
The total amount of 21mill coins has never to be touched.
Trust is an edible characteristic in every setting (business, relationship etc), the crypto community rally behind Bitcoin when the government was against it due to the trust they in Bitcoin, and if there suddenly changes in the total supply or halving timespan that trust will quench. Network upgrading is what Bitcoin need now but hard fork is the solution to your idea.