Do not put your money into Pix because Brazil's government has become extremely authoritarian and anti democratic, including jailing political opponents.
As far as I'm aware, Pix is just a way to transfer money. You do "put money" into Pix.
Regarding the rest, I'm not following Brazilian politics that closely, but if politicians try to stop a democratic transition of power, then any functional democracy has to deal with them. I don't know how you can do that without doing things like jailing those who were involved. We can't do whatever we want and then call it political prosecution.
You do not "put your money into Pix", your money is in your bank account. Pix is just a bank transfer mechanism; if you have a Brazilian bank account, you can send and receive through Pix.
Oh boy here we go, the bolsonaristas are here to claim that Bolsonaro and his cronies definitely didn't try to overthrow the current government in favor of a military dictatorship and that there's definitely not a mountain of evidence pointing in that direction. Nope, it has to be some deep state commie conspiracy of course.
And he got out, using the same justice system, because of the irregularities of the arrest, not sure if it's an authoritarian indicative or just the justice system being terrible slow