Wait don't miners have to do this anyway? Like even before the halving don't they have to sell their bitcoin? So why does this have any effect on bitcoin being sold on exchanges? And in-turn why does it reduce selling pressure?
Miners having to sell their bitcoin completely depends on them. But mostly for the large-scale miners, again like I said, they need to pay for and afford all the electricity they're using one way or another(the electricity usage of large-scale miners are NO JOKE), and one of those easiest ways to access cash is to sell the bitcoin they mined.