This is partly why I think even shitcoins and tokens with high premiums to utility value are often validly worth their price and more in crypto. A comparison to global asset classes should yield somewhere in the range of 5 - 10 trillion even without it becoming a direct competitor to fiat simply looking at what investors, central banks and government currently have in store of value assets like gold, silver and diamonds. The demand for a decentralised global asset class with low barriers to entry and being immune from country specific issues and monetary policy is absolutely huge and completely unprecedented. This sphere of digital decentralised assets has been potential bull market in the making for decades and decades.
Your point on gold is hugely important in this respect too, third world countries and even first world nations with high credit risk that require a stable asset class with low barriers to entry simply can't use gold because it is impossible to store or buy easily due to risk of theft. Gold cannot be an effective long-term store of value due to its tangibility and physicality, which of course also makes it worthless as a means of exchange in the longer term if major fiat currencies like the Euro and USD do begin to falter. The people who see the lack of physicality to cryptocurrency as a negative are simply dinosaurs without an understanding of how to drive technological and economic efficiency, they aren't business minded or logically thinking human beings.
People get too caught up in the "currency" side of it simply because it's in the term "cryptocurrency", but really they need to look at the features that create demand like ease of peer to peer transaction, fungibility, decentralisation, lack of proximity and correlation to traditional national based asset markets like bonds, currency and stocks, long term potential adoption, divisibility and security benefits of its purely digital nature. None of these useful features of the asset class existed elsewhere until crypto came along. There is no way in hell this won't become a legitimised and large-scale alternative asset class in the future because like all great technologies it fills a gap in demand that has existed essentially forever.