Ecash is the purest/leanest form of money as data. It can probably not get any leaner than just a text string.
Trust without guards or third parties is central to many relations (also over the internet) where value is exchanged, for example any provider-user relation is inherently (partly) trustbased. Blinded Ecash can be an improvement of the risk you face in these relations, also compared to solutions using traditional banking payments.
Because of the points above, and for many other reasons, the payment solutions possible through ecash can be swifter, more private, less burdensome in resources, bigger in transaction throughput than a.o. things like Lightning network, ApplePay, Visa/mastercard
Ecash isn't so much a store of value, but it is up there with the best medium of exchange.
Just zapped you from my ecash wallet