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IMO there is no proof the Universe is expanding. The biggest problem here is that to judge speeds and distances in 3 dimensions where everything is assumed to be moving, you need 2 fixed points (separate celestial bodies). We don't have that. We have rates of change that seem to be stable. But when you're talking billions of lightyears, a 0.10% margin of error is still a really huge number. Also on our very small human timescale, we're not going to see changes big enough to measure with any accuracy.
Also Hubble has a limited view and it's assumed it can not see to the end of the Universe.
All we could every know from it might be when the Universe shrinks and it starts seeing that. But we never will.
Space, outside of Earth orbital, is 100% fruitless and pointless to spend money on. There are far more pressing matters we should be tackling.
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