Sure, there were some old fogies (actual advanced age not required, but common) who thought in ~2000 that the Internet was nothing but a passing fad, but anyone with actual sense—including many, many people who were not at all financially invested in tech companies—could see that there was plenty of real substance there, however overly-inflated some valuations were at the time.
By 2000, we already had, very firmly-established, companies like Amazon and eBay, that were clearly worthwhile Internet marketplaces making it vastly easier to buy & sell things.
In 2022, the most "firmly-established" things we have in the blockchain landscape are the cryptocurrencies like Bitcoin, whose sole purpose is to be a different kind of money and/or speculative vehicle. Effectively the only people pushing these things are the ones who stand to lose lots of money when they finish crashing.