I feel like this is an argument against money, not necessarily cryptocurrencies in general and even less against Bitcoin specifically.
Yes, creating opportunities will lead to people who don't really need it taking advantage of those opportunities. But, it also means that people who really need opportunities can take those too, as it's a open network.
So yes, richer gets richer while the poorer is getting poorer. At least cryptocurrencies are leveling the field a bit, so the the poor has a bigger chance out of poverty. As someone who used to be poor, I welcome the new War In the Status Quo.
Have you considered that there are indeed legitimate reasons not to like bitcoin, like those outlined by the previous commenter?
Or e.g. I think the detachment from the nation state is a dangerous element that will foster a race to the bottom on taxes, environmental standards, etc as capital gets even more mobile and untraceable than before. A small crowd gets the benefits and many many miss out with underfunded schools and healthcare...
But because we engineered a way to magnify the wealth of the people who need it least, at a huge environmental cost for no reason.
It's like all of the worst tendencies of our society reduced down and maximized.