Cypherpunks and other anarcho-capitalists are at the origin of this idea, perhaps 20 or 30 years ago. None were intended to make an investment to be rich quickly.
You won't find in the white paper "investing" mentioned, you won't find any post from Satoshi mentioning it
Why don't we see cryptographers anymore? Guess the reasons
I'm pretty sure none of them had any objections to trading, since free market is essential for the economy, and Bitcoin economy is no exception. Also, nothing in this world is created to be an investment, investing is essentially just finding undervalued things and selling them later, and things grow in their price because their demand grows, not because they were created to be a good investment.
Also, Bitcoin's success shouldn't rely on its users being strict libertarians/cypherpunks who use it because they are hardcore believers, ideally people should be using Bitcoin because it is objectively better than banks.
Why don't we see cryptographers anymore? Guess the reasons
Because in the early days Bitcoin was a small cypherpunk community, but now millions of people have joined this forum and other platforms. If you want to have discussions like in old good days, you should search some IRC channels or other similar places.