God doesn't object to wealth, but He does object to materialism (1 Tim. 6.10). There are people in the Bible that God made into very wealthy people (Abraham, Joseph, and Daniel). The Bible teaches us that (1) material things can be a sign of God's blessing, though they are not necessarily so, (2) We are accountable stewards of the wealth God gives us, and (3) We are responsible for others.
The Bible asks three questions about money:
- How did you get it? (legally and justly or exploitatively?)
- What are you doing with it? (indulging in luxuries or helping the needy?)
- What is it doing to you?
Just like alcohol, money isn't bad in and of itself. It's the abuse of it where the danger lies. Money itself is neither here nor there. First, it says that money can really mess a person up, so beware its intrinsic dangers. Secondly, if you have it it doesn't mean that "God is blessing you," or if you don't have it, that "God is cursing you." If you have it, fine, as long you didn't do something corrupt to get it. But if you have it, use it for good, and share it generously, and help others with it, as well as provide for your family obligations. If you don't have it, don't be anxious about acquiring it, because money doesn't buy happiness, godliness, or long life. Learn to be content with what you have, and be responsible with it.
Some billionaires use their wealth to accomplish things that could be accomplished in no other way, donating heavily to hospitals, universities, social good, scientific research, etc. So we can't say justifiably say that all billionaires are just hoarding or that not instantly giving it all away is wrong.
> why do so many Christians seem to fight against sins that relate to matters of sexuality (i.e. promiscuity and homosexuality) whilst doing so little to fight the sin of avarice?
I'm not aware of many Christians fighting against sins of sexuality. Instead, I see the LGBTQ+ "community" engaging in many lawsuits and protests against Christians. Additionally, I've heard many pastors and preachers denounce avarice from the pulpit more than sexual sins.
So I don't know if you're just assuming a generalization that isn't accurate or if your personal experience is such that sexuality is a target whereas greed isn't. In either case, I'm not convinced it's true.