I have limited time (unfortunately) so I have skimmed through comment rather than read it fully, but the main reason I see cryptocurrencies having value at all is because some of them provide solutions that are either superior to their centralized business alternative, or simply do not exist in centralized form. As a result, if you want to partake in this activity, you must own the token. The token value will increase the more demand there is for the particular service it provides. Investors buy in because they anticipate real demand for a service a cryptocurrency provides to increase. This is really top level and I'll likely have to make a separate video and article on it at some point.