Earlier quoted context omitted.
The difference is that the Internet had clear useful applications at that point and billions of dollars in real business (not just speculation) was happening annually. Yes, there were plenty VC misfires with no plausible path to profitability — my favorite was cement.com, with free shipping! — but there were tons of existing businesses finding significant value from it and new companies like Amazon, eBay, Travelocity…
Saying that there is no reason to buy a crypto-currency is absolutely false. You probably live in a Western country where you mostly trust the banking system and stability of your own currency. That is not the case in many other countries. You will probably say that most crypto-currencies are extremely volatile, which is true, but there are already existing and active projects that have addressed that issue, for exam…
Besides, if I lived in Venezuela or Russia, would I really want to record my black market activities in a public ledger which is hard to disavow?