1. With the Apollo missions, the money being put into the project was going into research and development, so there was at least some expectation of getting new science and technology out of it. With Bitcoin,nthe money put in is going into speculation or mining, which only fuels the network. There is no reason to expect new technologies to come out of this, and certainly not any new science.
2. The Apollo project was a big consumer of money, of which there exist plenty in the world and we can create more. Bitcoin is a huge consumer of electricity, the production of which is generally accelerating global warming, the single biggest threat to our survival as a civilized society that has ever existed in history.
We already know that Bitcoin itself is not even remotely close to being a solution to the problem you're thinking about (decentralized money), even IF I agreed that this is a real problem (I don't, I believe Bitcoin is going in the wrong direction compared to fiat money). You could make a decent argument for investing in developing scalable crypto coins, maybe Ethereum or maybe something else, but proof-of-work crypocoins and Bitcoin in particular are an obvious dead end, and can be decommissioned entirely without much loss (especially if the bitcoin holders were compensated somehow).