@freemo No, but wealth is a marker of exploitation. A certain degree of wealth can be legitimately earned, but above that point, the wealth is grossly disproportionate to the value created for the economy and can only be obtained through some degree of systemic exploitation of the labor of others. Stock trading is the classic example of this.
So, in that sense, the sign in the OP is accurate.
@freemo Except, again, if you have the wealth, it means it's not being donated to charities. It's still yours.
Charity would, therefore, be a limiting factor to wealth. Good people would donate enough of the excess to avoid being over that evil-wealthy line.
Moreover, charities are free to invest the money too. Why would a wealthy person hanging on to it for themselves to invest be better than giving it to the charity to choose to do with how they think best (including investing)?