Digital tokens are worth nothing ... unless we create value somewhere.
I propose the network is the value that we can create and a by product of that is your tokens will go up in value. Much better than interest especially considering interest is measured in %, capital gains for crypto are measured in X.
A whale or anyone delegating a portion of their SP for free to good projects and people to help the network grow could be the wisest investment for their SP.
Steemit already managed to successfully bootstrap steem tokens, with a bunch of large whales devouring everything and the rest of 99% small fish desperate to seek attention.